I believe the issue is that you used Bezier and not X-Spline in Mocha AE? This may be a bug inside of Mocha AE and its ability to convert to AE bezier on particular types of shapes. It may be fixed in a newer version but in the meantime, I suggest trying Mocha’s X-Spline which in general can be easy to manipulate than bezier one you are used to them.
Hope this helps.
-R
Ross Shain
Imagineer Systems
http://www.imagineersystems.com