Any idea whats wrong with my top layer?  

Any idea whats wrong with my top layer?

I dont know what information is and isnt relevant so I'll just go through everything.

Printer was running fine, no complaints besides the fact that the thinnest I could get a calibration layer was 0.22mm, not 0.2mm.

I noticed some weird layer shifting in the prints, which I eventually narrowed down to filament getting caught under itself. Honestly think I just tucked it in to store it and forgot to untuck when I next loaded it.

After fixing this I tried printing a model at 0.05mm layer height for the first time. I ended up with some blobs and stringyness, which was likely an issue with z hopping from what I've read. I put that on hold and went back to what I was doing with 0.2mm layers.

And then this top layer scarring started happening...

I thought maybe the caught filament messed up z calibration, so I re did that, no dice. I then recalibrated offset. First attempt was a clean 0.2mm exactly, second attempt was 0.22mm again. 

I then tried looking into z axis issues. My z axis made more noise then any other, but since stuff has been fine so far I never touched it. I tried loosening screws on the top and bottom, running the axis up and down, and tightening them again to try and re align the axis. I also tried loosening the screws on the z axis nuts because I heard those being too tight were a problem. Noise got a little better, re ran z calibration, annnnnd top layer scarring happened again. I'm at a loss, any ideas?