My printer is acting weird.
Hello. I just got Prusa Mini last week and it starting to do weird things and is messing up prints.
It started one day when during self leveling, the z-axes kept going down and the motor started to make a loud grinding noise. I panicked and restarted the printer.
After that it's been having trouble printing. Missing layers or not aliening lines properly. Also the motors are much louder now then when I first got it. 
For context, I am very new to this and I also bought my printer pre-assembled.
RE: My printer is acting weird.
Go to prusa3d.com and get on the chat with Prusa support. For a new machine like this you want to make sure you're covered if it's a warranty issue. They're 24x7.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...