>>322403315
>Did they have an unapplied mirror modifier on them?
Epic, I can't believe I didn't think to check for that, thank you so much.
Yes, I did merge the meshes but I have to leave some out for toggles. I thought I was doing something wrong in the process of merging so I went on to separate all of them to see if the same problem still appeared.
I'm guessing all modifiers should be applied before exporting then? Also what about the armature modifier?