+20% > 50

I found a +20% < 50 Battle Pick the other day....Question is, I thought +15% was the best you could get for a damage modifier....can anyone tell me if this is a bug or just rare?

15% is max for positive conditions. 20% is max for negative conditions like hp < 50% or while hexed.

+15% is the best you can get for while in stance, enchanted, and above 50% health. 20% can be found on below 50% and while hexed (or vs. hexed enemies, I can never remember which it is).

so 20% < 50 is pretty common?

I'd guess 20<50 is about as rare as 15>50.

I'd also guess almost anyone would prefer the 15>50 though, since its just usually more useful.

There are such weapons but they have something like -5 energy or -10 armour (while attacking)

Yup, max on those is 15%. And i think 20<50 is more rare than 15>50, but its not that good.