I'd suggest looking at this animation in UModel itself. May be it has 80 frames in Unreal?
Sorry for late reply.
The source of my issue is somewhere else i guess :/
I am usually ripping from Unity Mobile games, which gives me FBX files including animations. Then i'm converting them to psa/pka via Noesis. This step is required to get everything to work properly for my purpose.
The ActorX importer is a must have at this point, as well as Noesis. So i actually have no control about the keyframes until it's getting imported from ActorX importer.
I just hoped it could be an "issue" of the importer but it most likely happens in Noesis which is out of my control(cant do much with frames in Noesis).
You seem to be pretty familar with Max Script. Do you think the is a way to detect duplicated frames and delete them?