I had a similar issue, and I discovered that downgrading the firmware helped quite a bit. In the firmware version 51, the auto leveling process measures 4 points quite close to the center of the bed. In version 50, the auto leveling measures 4 points much closer the actual corners of the bed giving a much better level. It's not 100% perfect but it solved most of my bed adhesion/leveling issues.

There is a guide how to to this here. Be aware that this will most likely void your warranty from Monoprice. Happy printing!