I'm not sure if if this is intentional or not, but if you fashion a staff, strengthen it, then imbue it, you can strengthen it a second time.

Log to follow, snipped for content that matters.

fashionstaff
You create a ranger's staff!

<502(100%)hp><305(80%)mp><99%mv><7 PM><12963tnl>
score
Zshaboa the Spelunker
-------------------------------------------------------------------------------
Level : 31 Sex : male Race : felar
Ethos : Neutral Align : Neutral Class : ranger
Practices: 6 Trains : 1 Hometown : Emerald Forest
Exp : 230787 To Level : 12963 Sphere : Purity
Age : young, 23 years old (53 hours)
Hit Point: 100% Mana : 82 % Move : 100%
Str : 17(17) Int : 17(17) Wis : 18(20)
Dex : 23(23) Con : 21(21) Chr : 14(14)
Carry # : 4/37 Weight : 16 lb 3 oz (Max 257 lbs)
Gold : 0 Silver : 0 Copper : 0
Wimpy : 120 hp Morale : Secure Position : Standing
Hitroll : 5 Damroll : 3
AC pierce : -10 Well armored AC bash : -10 Well armored
AC slash : -10 Well armored AC magic : -10 Well armored
AC element: -10 Well armored
vs Spell : Not protected vs Paralysis: Not protected
vs Breath: Not protected vs Mental: Not protected
You feel slightly hungry.
Your expertise is in the savage style.
Your home terrain is the caverndweller terrain.
You are affected by:
Spell: 'protection from metals' for 27 hours.
Skill: 'acute vision' for 21 hours.
Spell: 'armor' modifies armor class by -20 for 18 hours.
Physical effect: 'cabal raid' modifies morale by 9 for 18 hours.
Physical effect: 'cabal raid' modifies morale by 12 for 15 hours.
Skill: 'protection heat cold' for 4 hours.
Power: 'unbound spirit' modifies wisdom by 2 for -1 hours.
Power: 'unbound spirit' modifies morale by 10 for -1 hours.
-------------------------------------------------------------------------------

<502(100%)hp><314(82%)mp><100%mv><8 PM><12963tnl>
wield staff
You wield a ranger's staff.
A ranger's staff feels like a part of you!

<502(100%)hp><323(85%)mp><100%mv><9 PM><12963tnl>
score
Zshaboa the Spelunker
-------------------------------------------------------------------------------
Level : 31 Sex : male Race : felar
Ethos : Neutral Align : Neutral Class : ranger
Practices: 6 Trains : 1 Hometown : Emerald Forest
Exp : 230787 To Level : 12963 Sphere : Purity
Age : young, 23 years old (53 hours)
Hit Point: 100% Mana : 85 % Move : 100%
Str : 17(17) Int : 17(17) Wis : 18(20)
Dex : 23(23) Con : 21(21) Chr : 14(14)
Carry # : 4/37 Weight : 16 lb 3 oz (Max 257 lbs)
Gold : 0 Silver : 0 Copper : 0
Wimpy : 120 hp Morale : Secure Position : Standing
Hitroll : 5 Damroll : 3
AC pierce : -10 Well armored AC bash : -10 Well armored
AC slash : -10 Well armored AC magic : -10 Well armored
AC element: -10 Well armored
vs Spell : Not protected vs Paralysis: Not protected
vs Breath: Not protected vs Mental: Not protected
You feel slightly hungry.
Your expertise is in the savage style.
Your home terrain is the caverndweller terrain.
You are affected by:
Spell: 'protection from metals' for 26 hours.
Skill: 'acute vision' for 20 hours.
Spell: 'armor' modifies armor class by -20 for 17 hours.
Physical effect: 'cabal raid' modifies morale by 9 for 17 hours.
Physical effect: 'cabal raid' modifies morale by 12 for 14 hours.
Skill: 'protection heat cold' for 3 hours.
Power: 'unbound spirit' modifies wisdom by 2 for -1 hours.
Power: 'unbound spirit' modifies morale by 10 for -1 hours.
-------------------------------------------------------------------------------

<502(100%)hp><323(85%)mp><100%mv><9 PM><12963tnl>
rem staff
You stop using a ranger's staff.
<502(100%)hp><323(85%)mp><100%mv><9 PM><12963tnl>
strengthen staff
You pull upon the essence of a ranger's staff, strengthening it.

<502(100%)hp><323(85%)mp><100%mv><9 PM><12963tnl>

wield staff
You wield a ranger's staff.
A ranger's staff feels like a part of you!

<502(100%)hp><341(89%)mp><100%mv><11 PM><12963tnl>
score
Zshaboa the Spelunker
-------------------------------------------------------------------------------
Level : 31 Sex : male Race : felar
Ethos : Neutral Align : Neutral Class : ranger
Practices: 6 Trains : 1 Hometown : Emerald Forest
Exp : 230787 To Level : 12963 Sphere : Purity
Age : young, 23 years old (53 hours)
Hit Point: 100% Mana : 89 % Move : 100%
Str : 17(17) Int : 17(17) Wis : 18(20)
Dex : 23(23) Con : 21(21) Chr : 14(14)
Carry # : 4/37 Weight : 16 lb 3 oz (Max 257 lbs)
Gold : 0 Silver : 0 Copper : 0
Wimpy : 120 hp Morale : Secure Position : Standing
Hitroll : 7 Damroll : 5
AC pierce : -10 Well armored AC bash : -10 Well armored
AC slash : -10 Well armored AC magic : -10 Well armored
AC element: -10 Well armored
vs Spell : Not protected vs Paralysis: Not protected
vs Breath: Not protected vs Mental: Not protected
You feel slightly hungry.
Your expertise is in the savage style.
Your home terrain is the caverndweller terrain.
You are affected by:
Spell: 'protection from metals' for 24 hours.
Skill: 'acute vision' for 18 hours.
Spell: 'armor' modifies armor class by -20 for 15 hours.
Physical effect: 'cabal raid' modifies morale by 9 for 15 hours.
Physical effect: 'cabal raid' modifies morale by 12 for 12 hours.
Skill: 'protection heat cold' for 1 hours.
Power: 'unbound spirit' modifies wisdom by 2 for -1 hours.
Power: 'unbound spirit' modifies morale by 10 for -1 hours.
-------------------------------------------------------------------------------

<502(100%)hp><341(89%)mp><100%mv><11 PM><12963tnl>
rem staff
You stop using a ranger's staff.

<502(100%)hp><341(89%)mp><100%mv><11 PM><12963tnl>
cast 'imbue weapon' staff
You place your paws on a ranger's staff and imbue your energy into it.
You step out from your cover.
Your transfer of energy *** DEVASTATES *** you!
That really did HURT!

<335(66%)hp><308(81%)mp><50%mv><11 PM><12963tnl>
wield staff
score


<490(97%)hp><308(81%)mp><50%mv><11 PM><12963tnl> You wield a ranger's staff.
A ranger's staff feels like a part of you!

<490(97%)hp><308(81%)mp><50%mv><11 PM><12963tnl> Zshaboa the Spelunker
-------------------------------------------------------------------------------
Level : 31 Sex : male Race : felar
Ethos : Neutral Align : Neutral Class : ranger
Practices: 6 Trains : 1 Hometown : Emerald Forest
Exp : 230787 To Level : 12963 Sphere : Purity
Age : young, 23 years old (53 hours)
Hit Point: 97 % Mana : 81 % Move : 50 %
Str : 17(17) Int : 17(17) Wis : 18(20)
Dex : 23(23) Con : 21(21) Chr : 14(14)
Carry # : 4/37 Weight : 16 lb 3 oz (Max 257 lbs)
Gold : 0 Silver : 0 Copper : 0
Wimpy : 120 hp Morale : Secure Position : Standing
Hitroll : 13 Damroll : 11
AC pierce : -10 Well armored AC bash : -10 Well armored
AC slash : -10 Well armored AC magic : -10 Well armored
AC element: -10 Well armored
vs Spell : Not protected vs Paralysis: Not protected
vs Breath: Not protected vs Mental: Not protected
You feel slightly hungry.
Your expertise is in the savage style.
Your home terrain is the caverndweller terrain.
You are affected by:
Spell: 'protection from metals' for 24 hours.
Skill: 'acute vision' for 18 hours.
Spell: 'armor' modifies armor class by -20 for 15 hours.
Physical effect: 'cabal raid' modifies morale by 9 for 15 hours.
Physical effect: 'cabal raid' modifies morale by 12 for 12 hours.
Skill: 'herbs' for 5 hours.
Skill: 'protection heat cold' for 1 hours.
Power: 'unbound spirit' modifies wisdom by 2 for -1 hours.
Power: 'unbound spirit' modifies morale by 10 for -1 hours.
-------------------------------------------------------------------------------

<490(97%)hp><308(81%)mp><50%mv><11 PM><12963tnl>
rem staff
You stop using a ranger's staff.

<502(100%)hp><317(83%)mp><57%mv><12 AM><12963tnl>
strengthen staff
You pull upon the essence of a ranger's staff, strengthening it.

<502(100%)hp><317(83%)mp><57%mv><12 AM><12963tnl>
wield staff

You wield a ranger's staff.
A ranger's staff feels like a part of you!

<502(100%)hp><335(88%)mp><72%mv><2 AM><12963tnl> Zshaboa the Spelunker
-------------------------------------------------------------------------------
Level : 31 Sex : male Race : felar
Ethos : Neutral Align : Neutral Class : ranger
Practices: 6 Trains : 1 Hometown : Emerald Forest
Exp : 230787 To Level : 12963 Sphere : Purity
Age : young, 23 years old (53 hours)
Hit Point: 100% Mana : 88 % Move : 72 %
Str : 17(17) Int : 17(17) Wis : 18(20)
Dex : 23(23) Con : 21(21) Chr : 14(14)
Carry # : 4/37 Weight : 16 lb 3 oz (Max 257 lbs)
Gold : 0 Silver : 0 Copper : 0
Wimpy : 120 hp Morale : Secure Position : Standing
Hitroll : 15 Damroll : 13
AC pierce : -10 Well armored AC bash : -10 Well armored
AC slash : -10 Well armored AC magic : -10 Well armored
AC element: -10 Well armored
vs Spell : Not protected vs Paralysis: Not protected
vs Breath: Not protected vs Mental: Not protected
You feel slightly hungry.
Your expertise is in the savage style.
Your home terrain is the caverndweller terrain.
You are affected by:
Spell: 'protection from metals' for 21 hours.
Skill: 'acute vision' for 15 hours.
Spell: 'armor' modifies armor class by -20 for 12 hours.
Physical effect: 'cabal raid' modifies morale by 9 for 12 hours.
Physical effect: 'cabal raid' modifies morale by 12 for 9 hours.
Skill: 'herbs' for 2 hours.
Power: 'unbound spirit' modifies wisdom by 2 for -1 hours.
Power: 'unbound spirit' modifies morale by 10 for -1 hours.
-------------------------------------------------------------------------------

----**
As you can see, the HR and DR both go up.

When you imbue, it strips the previous strengthen.