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Hello ive been trying to ''correctly'' import my jason file in after effects but I can't figure out what I'm doing wrong.

When I use these setting (see image below) to import my jason file only one of the three layers show up and the composition is only 2 seconds long instead of 4 like in my tv paint file.

Settings: https://imgur.com/a/nYpq5mn

Timeline in tvpaint: https://imgur.com/a/Vrm3G1l

Timeline in After effects: https://imgur.com/RVmUQyU

I tried changing the settings while importing and exporting but nothing seems to fix the problem. This is really annoying!

I usually only deal with 24fps, but I simulated your case.
I checked the script, but the reason is that the frame rate when creating a composition from layers is fixed at 24.00038.
Only the camera is a program that calculates from the frame rate set in TVPaint. I don't know why, because the developer is not in TVPaint now.
From ImportTVP5.5, I've corrected only this part. Please use at your own risk.