AFR misleading? Plugs tell a better story?

I don’t know what happened, I did two rounds of leak testing today. Weird numbers on #1, and a couple of others. I was going to do a third and final test to confirm numbers. When warming up the motor I heard a tick at first I thought it was lifters which always seem to be noisy for a little while. Well it turned into a knock. I’m pretty sure it’s not an exhaust leak. Then I found a small puddle of oil on the floor. Looks like it was pushed out of dip stick. My brother in law has a very small wire camera he’s bringing over tomorrow to look in the cylinders. I’m thinking I should pull the pan. Ugh. Unbelievable. Motor was showing leakage from 3% to 16%