when attacking with swarms there is probably about a 75% that all swarms will only apply splash damage
for example if a conq. station turrets is stacked upon it will only bring it down to 85% instead of the either killing the turret or bringing down to 6%.

Any post to bugs needs to follow the basic rules stated in the sticky thread.

We need to know all the pertinent details, like when and where you were in the game, etc.