Oil leak behind the cam

Success! Got oil flowing through all rockers on both heads.

I was turning the shaft with the drill at full speed, “next thing you know old Jed’s a millionaire!!! Oil that is, black gold...Texas tea...” I had an oil fountain squirting a foot into the air! Funny thing though, I noted the balancer position when it happened, and it was right at 0 on the timing cover. Next time around it was maybe 10* before the 90 mark I had made. Is this a problem?
Was it coming out of one head the first time and the other head the 2nd time? If so, that is normal; the 2 sides will oil at different crank angles.

Also a question about the priming process. Once I get oil flowing to the heads, am I done? How long should I let the oil flow?
Yes, you are done.