Issues with left handed mode

Recently got a Huion Kamvas 13 for Christmas. I've been trying to set up left handed mode, I follow all the instructions and it works fine... until i actually open a program. Then the pen bugs out and the cursor goes the opposite direction of the pen. It happens in Medibang Paint and Firealpaca, it works fine in krita except for some reason the entire program zooms in and everything becomes big and bulky on the screen.