I see what you meant last night. Yeah this is horrible. I don't think it could be the camera though. I think maybe there's an issue with the plastic reel.
The consensus on the thread seems to be improperly loaded reels. So, I'm working on my technique and trying to figure out how I can tell if the film isn't loading properly. I can usually tell with 35mm if something is going awry, but apparently it's not so obvious (to me at least) with the 120. I'll keep playing these dry runs, and no doubt it will get figured out.
If by some faint chance it does turn out to be the camera I'm going to give up all my worldly possessions and find a blunt peak in the Peruvian Andes to sit on for the rest of my days.