Sounds as if you used too much oil, only a squirt or 2 is what is required to test for possible faulty rings. A large amount of oil will decrease the volume and increase the pressure. I think you need to run the engine a short time to burn off the excess oil in #1. You can do this without coolant but only for less than minute. Retest and record all cylinders . You may have done something wrong on your initial test of #1.

I am puzzled by your reading on #1 when you say 60-90, what was the reading, it can't be a range, it can only be a single number.

Sometimes a bit of froth at the top of the dipper is normal, you may also see a bit on the inside of the filler cap. This can be due to condensation and will burn off with a good highway run. Therefore it was not necessarily a sure sign of a blown head gasket. You probably would have observed other symptoms such as oil in the coolant, loss of some performance, loss of coolant, white vapor exhaust even when warmed up. My experience with a blown gasket was the oil turned to a choclate milkshake and I had oil in coolant.

Most common cause of head gasket failure is an overheat incident, did that happen?