What kind of oil are you running also. Is the small pin small and round? I only had mine apart once and am a little foggy on what it looked like, but for a pin to do that kind of damage the bearing would have to be smacking against it continuously and the motors only spinning 1 direction, so other than the little deformations in the round "groove" it looks normal.
As for the oil, ur on ur own there. I'd recommend cleaning it, sealing it back up and checking again.
While you have it apart might as well check for flatlness across all the decks too, that's an easy thing to do.