Venom Pressure+Impress Not Working

Venom Pressure should be affected by the EDP 400% damage boost. If you are following the iROwiki damage formula for Venom Pressure it does 1000% of regular damage. With EDP Venom Pressure should reach 4000% or 40x my normal damage.

Venom Impress increases damage done when enchanted with poison. The percentage increased is based on the level of the skill. At level 5 there should be a 50% increase in damage.

I decided to run some test on another player in PvP and this was the result:

Without Venom Impress or EDP:
Regular Dmg: 475
Venom Pressure Dmg: 472

With only EDP:
Regular Dmg: 1146
Venom Pressure Dmg: 1167

With both EDP and Venom Impress lvl 5(+50% modifier):
Regular Dmg: 1175
Venom Pressure Dmg: 1167

Venom Impress had NO effect at all (that small 29 damage increase was because of double attack activation)
Venom Pressure is working with EDP, BUT only dealing 100% of regular damage rather than 1000%