Sorry if this is a double post, I think the Jagged short sword proc is broken, I've had it for a long time now and never seen it proc, and I was using it on and off for 2 hours of constant fighting, and never saw it attempt to proc. Not sure if its just the one I have or if its the sword in general, or something else.

The prog works (and I assume its by design) when the weapon is in your primary wield spot but not the secondary.

...is doing exactly what it is supposed to do.

The prog hasn't changed in years, I just tested it and it works. What were you fighting for two hours?