Without seeing the footage, it is difficult to advise...
You might want to use the AdjustTrack module which was created to handle track drift. Also - are you sure you do not need a 3D camera track? You mentioned using Element. If you want 3D text to sit in a scene and there is significant motion & parallax, you may need a camera solve.
If you need mocha help, you can always contact support at:
http://www.imagineersystems.com/contact_form or post on the forum:
http://forum.imagineersystems.com/