Hi guys.

So I've been trying to make a multi-screen video (3 videos). I use pan/crop tool to resize and adjust the width of the videos (on the position panel) so that they fit on the screen (1920x1080) and the motion track tool to move the first video to the left, the second to the middle and the third to the right. Now, when I render, all 3 videos mix up and resize randomly without stoping. 
Any suggestions? Thanks in advance