Composition change resolution during export.

When you produce projects for specialized video display systems, following the manufacturer's recommendations is critical. I have often had to render an image sequence or uncompressed video at odd sizes, then use specialized encoding software to generate the appropriate media for playback. Check with the folks that commissioned the project and find the specifications. They are published somewhere. Follow those, and you should have no problems.

Limitations in OpenGL/ OpenCL, CUDA etc. due to how math works on GPUs (power of two values preferred, symmetrical pipelines etc.) most likely. If this isn't hard-set in AME itself you could try to switch to software-only mode and it may unlock the values, but otherwise you're really out of luck. Adobe has always adhered to standardized specs pretty closely and weird out-of-spec formats like yours are always troublesome. You may need to resort to other products outside the Adobe world for final encoding after you've rendered your clips directly from AE to an unconstrained format.

Mylenium