Got two drastically different compression results

Hi folks, I'm working on a 07 Saturn Outlook with the 3.6 V6 and 134k miles.

Car came in misfiring and CEL so the first thing I did is I scanned it. Came up with P0301, cylinder 1 misfire so first thing I did was swap coils, clear the codes and run the car. Blinking CEL and same code came up so next thing I did was install a new plug. Old plug was quite black and sooty. Cleared the code, ran it again and the same code came up. So now Im thinking it may be fuel related like a weeping injector or something. With the car running I did a cylinder drop test by unplugging the coil. I compared cylinder 1 with the others and what I noticed its that there wasn't much difference between cylinder 1 unplugged as the other ones, but it did make a noticeable difference when I unplugged it so I knew I was getting it to fire at least and it wasn't completely dead. Checked fuel pressure, it checked out okay so I did the fuel injector flow test while in the care. It dropped fuel pressure exactly the same as cylinder 3 and 5 so I figured the injector is not the problem. Lastly, I did a compression test. Cylinder 1 came back with 110psi when the min. calls for 140psi. Also I test cylinders 4 and 6 for compression and they had 170psi so I figured that the lower compression was the issue of the misfire. I put everything back together so I can move the car out of my shop and the care seems to drive okay. Drove it around for about 5 min and no blinking CEL or major roughness. So the next day I checked the compression again only to find that it is now at 150psi!!! What gives? What could have caused the compression to come up so much? I never added oil or anything to the cylinder when testing. Any thoughts? Thanks

the cylinder was probably washed down with fuelfrom the misfire

But then something would have caused the misfire in the first place in order for the fuel to wash out the cylinder right? Everything else checked out good. Also if fuel wash was the issue, wouldn't the injector flow test add even more fuel in the cylinder and cause it to be washed more?

An ignition miss while the injector is firing could was the cylinder walls. Without the oil film in the cylinder, the rings cannot seal as well. Now you change out the fouled plug and start making fire in the cylinder again and start burning the gasoline. After a period of time running, the oil film is restored to the cylinder walls, the rings seal better and compression is restored.

EDIT: Cheryl beat me to it

Noah wrote: An ignition miss while the injector is firing could was the cylinder walls. Without the oil film in the cylinder, the rings cannot seal as well. Now you change out the fouled plug and start making fire in the cylinder again and start burning the gasoline. After a period of time running, the oil film is restored to the cylinder walls, the rings seal better and compression is restored.

EDIT: Cheryl beat me to it

That's possible, but what caused the ignition miss? Its not the coil cause I swapped out coil to another cylinder and it was still that same cylinder that was misfiring. I put a brand new plug and still misfired. After doing the compression test (and injector flow test) I put the old spark plug in, just so I could move the car around and not have the new plug getting used and that's when I noticed it didn't misfire anymore and the compression went up... the old plug I didn't even touch the gap or carbon build up on it. Only thing I could think of it maybe a wiring issue but as of now it works totally fine.

I'm not sure what the cause may have been, but that's generally the scenario behind a cylinder that exhibits low compression but then returns to normal.