Do another compression test. This time, do it dry once, like you normally do. After you do that, put a cap or so full of oil in the cyl, and retest. If it goes up more then a few PSI, you need new rings. Which is what I think is the problem here.

Also, define "Compression test was good". What is good to you?
Your oil rings could be shot, and it would still compression test ok.