OK so I found out what my problem is. The first problem with the weird jump was because I had not yet gone into the graph editor and changed the Tangent to Linear and the Curves Pre/Post Infinity to Curve. After I did that, that problem was fixed.
As for the treads going off the motion path I have discovered that there is something wrong with the tread itself. I created another NurbCircle without any deforming and attached a tread. It went off the path in spots again. Attaching a plain Cube it stays perfectly on the path. So I will recreate my tread as there must be something wrong with the geometry.
What I don't understand though is that when I did the Create Animation Snapshot the tread worked perfectly and stayed on the motion path all the way around.
Thanks for the help.