Thats normal. If it were a timing chain and gear set you would have something to worry about since their alignment would be more critical. You verified the thrust of both the cam and crank and see they are both in spec. Put a dial indicator on the outside face of the cam gear and rotate it to see if it is crooked or shows to be wobbly. If it isn't out by more than a few thousandths, I don't think you have a problem to be concerned with. What does it look like on the back side of the gears, is the cam gear thicker than the crank gear to start with. Contact the gear manufacturer if you have doubts still after you check the gear face runout.
