Rogues skills damage glitch?

[Grizzlis]

So after some practise today, i noticed that skills Noxious Bolt and Shadow Piercer actual skill damage are significantly different! However, if you check these skills stats sheet, it shows that theyr damage are same! For example in sheet its 550 both, however nox true dmg 200-300 while shadow piercer is 500-600!! Also if you check charged piercer and uncharged piercer actual damage, its different, uncharged does more! So anyone noticed that too? I red about piercer damage bug in pve but tbh thats insanely OP, one of the main reason of rogues 1 shot combos. Its like having 2 aims