Man, was that guy in his right mind, making up some song and dance about "too much" credit? There is no such thing. Credits are ALL over the place. High, low, and in the middle, they are whatever the Admin(s) of that project set them to be. That guy, whoever he was just comes off as a whiner.
Really, consider who does he think he is to tell an Admin HOW to run HIS OWN project? Talk about the gall of that man. If I were the project Admin I'm pretty sure I would have told him - this is where I set it, this is my calculation (for better or worse) and if you have a problem with it, go find another project to crunch.
Just amazing behavior, really...