I am doing this:
http://puu.sh/ngZlO/7dfa49a871.png
All Actors are constantly moved a bit. But what you see in the game is that not all Actors are moved at the same speed. The character is moving a bit faster than all the other Actors.
Here you can download a repro project:
https://drive.google.com/file/d/0BzqDz_3FVfpOVW5GTkxpcWc3VTQ/view?usp=sharing
It’s just the FirstPersonTemplate with an Actor executing the code shown above. Another strange thing is, if you only hit simulate, it works. But once you possess the player, it starts moving faster than all other actors.