My text keeps getting partly blocked out...? Please help!

(Please excuse the vague question, I wasn't sure to how to word the problem)

In Motion 5, I'll be working and everything will look fine, and then I'll export the project to find some of the text looks like this:

http://www.mediafire.com/view/e823ezsb4z8z55t/Screen_Shot_2014-06-28_at_12.09.21 _AM.png

It seems to happen completely randomly, and sometimes I can go back and retype it and that'll fix it, but a lot of the time it doesn't fix the problem.

Does anyone know why this is happening and how to fix it? Any help would be appreciated, as I have deadlines coming up and I can't miss them.