Jody,
Hang in their...It's possible your I screws aren't perfectly centerd,or one side of the bait could be slightly larger.I generally always pour some lead in the bottom of my baits too act as a Ballast.This improves the castability of the bait,helps it swim correct,and can hide minor defencies in your bait.
Use this first bait as your guine pig,and learn from it.Drill a small hole in the bottom center of the bait,and add some weight...that just might fix your problem..Nathan