SO I made sure my batteries were full and then messed around a bit, when the contrast is at an exact half it does look inverted but is very very hard to see, when any higher (as in turning the contrast dial away from yourself) it becomes impossible to see, the only thing visible is the word "song" in LSDJ and when cranked the whole screen becomes whiteish.
When the contrast is darker than half (turning the dial towards yourself) it then becomes normally polarized and is quite view-able except for the word "song" up in the top left corner in LSDJ, and when cranked all the way is black.
I tried tightening and loosening screws to no avail, and looks the same way when the front PCB is dismounted, I have no clue what exactly is going on.