Hey S4Dallas,
If you are stalling on the vertical panels, assuming they are flat, it's likely you are tilting the machine without knowing it. I know I've been guilty of this many times in the past.
The best way to check your technique is to take a video of yourself polishing or have someone watching you to ensure that machine is parallel with the panel. It should be like the image harris posted. :xyxthumbs:
As for the Innerflex pad I would contact Griot's and let them know what happened. I'm pretty sure they'll send you a new one. Be sure you are removing the innerflex by the backing material and not grabbing it the foam. The same would apply with removing pads. I've also suggest Griot's make some kind of centering tool as it can effect the smoothness if not centered on the backing plate.
Hope this helps,
Rasky