I assume this is the same issue as your TurboTwist post. I know that this product uses the X axis exclusively so maybe if you have both masters they are using the same axis? Yeah, I would try to get a hold of RandyT to see if he has more insight on this.
I actually got the main issue resolved. The push-pull works great. And i actually had them both working perfectly. I shut down the machine, came back and this new problem popped up.
Knowing they use X exclusively, gives me an idea. In the config, it currently is setup this way.
input_map[p1_dialx] mouse[0,x] mouse[1,x] mouse[2,x] mouse[3,x]
Input_map[p2_dialx] mouse[0,y] mouse[1,y] mouse[2,y] mouse[3,y]
I am going to try changing p2_dialx to p2_dialy