[jonathan180iq]

I do feel like you're off by a whole turn... Like I said, that's just gut. I believe you probably seated the valves and seals just fine.

You're piston is probably on the compression stroke and one of the valves is open - hence no compression. If you just used the "T" mark, without verifying that you were at the right stage in the stroke cycle, then this is almost certainly what happened.