I really don't see any excessive shaving or wear on any of the lobes, atleast not enough to cause an engine grind-down! LOL I think you just had some dork that forgot to resize the rods after filing them down and maybe the mains too. Overall, a real crappy machining job.
I should be headed over to that side of town by Monday to pick up wood for my next kitchen. I'll make sure to take some pics along to show the pinhead.