I found a workaround, which means i have to render the whole thing in animation, then drag it back into AME, render with the preset, and it works. However it's a bit of a drag, and the job requires we output a few dozen of these. It's inefficient, to say the least.
I even tried prerendering everything and replacing it inside of after effects, but rendering from AE to AME still fudges up that lateral movement.
What could be the problem? What did I screw up? I can upload the preset as well, if you need me to.