The screenshots show how the broken bottle does almost the same damage per tick as spider fang dagger, even though this should not be the case as broken bottle is supposed to be 150 power a second with 3.33 hits a second, while fang is 100 power a second with 5 hits a second. A single barrage arrow does 7960 damage on crit, (400 power), a boulder throw crit does 8955 damage, (450 power) the total DOT damage of the broken bottle was 4382 (all dot hits critted, same bow and stats, supposed to be 450 power)
<-Broken bottle <-fang dagger
Here are the 2 daggers compared
Maybe the pvp mod has something to do with it?