Wow that is really strange. I have exported cloth from 2014 and while I had problems I didn’t experience any issues like that.
I followed this guys tutorial and it sorta worked for me:
The problem I had was when I put my character through her run animation her leg would pass through her dress. I gave up because every character in every example of apex cloth I’ve seen doesn’t have a legit dress, but instead a trench coat with the front open, a skirt, or some large slits somewhere which I believe is a work around to the problem rather than a design choice. I’m interested if anyone out there has a solution though.