i noticed that my hunter would lose my slaves after running around. didn't take me long to realize the reason was due to the fact he was BM and had the speed buff while hit pet was out. Make sure your leader doesn't have any speed enhancements that your slaves don't have. But you will also see a lag difference between what you see on your main and what you see on your slaves. If your main stops and your slaves are taking longer than they should to stop behind him/her, It might be network lag. But watch their window when your main stops. If they stop on their screens, but are still moving on your main's screen then it's visual lag on your main.I keep my slaves' windows just above my main like 3 rear view mirrors. I watch them at all times when running around to make sure they don't fall behind.