The proxy is stretched!

[Etn]

Hi! I really hope someone can help me, as I'm on the edge of a deadline, and proxies started making up some very weird troubles.
I'm doing an animated music video, and I'm editing the clips in Premiere to then finish them up in After Effects, each clip is a character animatio with an alpha channel, and they are all in different resolutions to mach character size (around 5000 pixel more or less).
I created the presets following the instructions in this thread
https://community.adobe.com/t5/premiere-pro/proxies-with-alpha/m-p/10864230
but, even thought the alpha problem is solved, when I enable proxy mode, the characters are stretched and it makes it very hard to compose properly.
Editing with the raw is impossible for me, especially in After Effects!
I hope there is a solutionto this! 
Have a great day!

[R Neil Haugen]

There could be several things here.

For instance, if the PAR of any of the proxies is different than the rest, that would do this. Next, the aspect ratio of each clip's total framesize would need to match all others. There's probably a couple other things.

Neil