Weird Compression Numbers

[Chezedik]

Just got finished rebuilding my engine again. Decided to do a quick compression test while I was only on one mount (in case I had to pull the motor later). With fresh rings (chrome top, cast iron second), filed, and the walls honed, stock cams and no intake mani it pulled 90psi dry. When I added a tablespoon of oil it pulled 240psi! This is only cyl 1, but I don't need to go any further if this is what I can expect. The starter sounds like it is turning slow, so I will charge the battery again. But it sounds almost identical when the battery is fully charged (I've done this a time or two). So I suppose that could explain the initial low compression number, and hydro-lock could explain the second high one. Or am I missing something? Can someone please tell me what this means?