Help Arduino Mega 2560 + 3.2" TFT LCD

HazardsMind:
I was under the impression you had a 240x320 screen, But you have a 240x400 screen. So instead of subtracting 320, you need to subtract 400.

That mean ...

myGLCD.printNumI(x-400, CENTER, 0); //X axis

I Test with

myGLCD.printNumI(x-400, CENTER, 0); //X axis

and

myGLCD.printNumI(400-x, CENTER, 0); //X axis

not better.