This seems a bit odd...

The nimble fleshy creature's bite misses you.
The nimble fleshy creature screams and attacks you!
The nimble fleshy creature's bite misses you.
The nimble fleshy creature's bite misses you.
Your pound injures the nimble fleshy creature.
The nimble fleshy creature is DEAD!!
You receive 78 experience points (33% bonus).
You raise a level!! Your gain is: 10/58 hp, 19/150 m, 6/190 mv 3/3 prac.
You are focusing your skill learning on wands.
The nimble fleshy creature's head is shattered, and her brains splash all over you.
You get 12 copper coins from the corpse of the nimble fleshy creature.
The gods give you one copper coin for your sacrifice of the corpse of the nimble fleshy creature.

***Says what I'm focusing on, but no skill gain***

detect charm 75%( 75%) detect invis 75%( 75%)
detect magic 75%( 75%) invis 1%( 1%)
magic missile 75%( 75%) axe 76%( 76%)
dagger 75%( 75%) staff 75%( 75%)
whip 75%( 75%) scrolls 75%( 75%)
talismans 75%( 75%) wands 75%( 75%)
recall 100%(100%) sighttheft 1%( 1%)
You have three practice sessions left.

***Invis was only just gained with that level up, so it doesn't count. I should have enough skills to get level gains.***

This is by design, you aren't guaranteed to always get a skill bump.