IMO, at this point it's only "questionable" because you don't think it looks right.

They have a QC dept, and someone there gave it the nod of approval.
Does that mean it can't have a problem? Of course not.

But they're doing all they can to satisfy your misgivings by having you send it back for them to look at again.

My previous comments were more directed at the "pile on" from some others on this thread.

My experiences with Comp are in line with Jim's.
Mistakes happen from time to time, and I have always had them taken care of as well as could be expected.

In the end, it's your motor so you should do what you feel is necessary to make sure the parts going in it are up to your standards.