It's a zombie placement issues on the servers, I believe or even a latency issues with the server. Either way let me look for you to get right on it. the zombies are taking strikes that momentarily racks their brains, that's not the issue. My problem is when I go to follow up with the next X2 strikes, i jump all the way around to the back of the zombie, with my favorite melee weapon (E.G. bone knife) the zombie almost leaps forward out of my striking range with what looks like latency from the connection to the servers