Platform bed is upper at the back than at the front


Hi, I´ve been having problems while printing with my M200 Plus because at the back of the bed where it has an only screw it prints prints correctly having the bed calibrated perfectly while at the front of the heated bed where It has two screws to calibrate it doesn’t prints correctly the first layer because its too close the bed to the nozzle. I really don’t know why is this happening because I already calibrated manually and automatic the bed like 5 times and its calibrated correctly. Also a thing to notice is that when calibrating manually the sheet of paper than I need to put while calibrating does not fit at the front of the platform between the bed and the nozzle even tighting the front two screws at the front of the bed, while at the back part of the platform the sheet of paper fits correctly to calibrate. Please help me, thanks.