Intermittent crankcase pressure issues

The compression test was this weekend and the leak down was early this year, I've done both now. I know 20% is huge, not sure what was going on there but I was doing it right and getting good readings on the other cylinders. I got good readings on those cylinders as well when I spun the engine back around to the next compression stroke so I know it wasn't user error. It's almost like the rings (or something) was only sealing part of the time and could explain al ot but I don't think the engine would really be running all that well if 2 of my cylinders where letting 80% by even part of the time.