[grbl Issue#1027] Scaling Issue for x-carve

Hi I have a 1000 mm by 1000 mm x-carve.

The x-carve seems to be cutting the right shape but in a larger scale.
For example, I asked easel to cut a 20 mm by 20 mm square, instead it cuts a square that is approximately 150 mm by 150 mm.

I bought a used x-carve and had to switch out the old Arduino with a new one because the old one died.
I have the latest Grbl 0.9j on the arduino.
After I calibrate it (getting the right direction and homing sequence testes on easel) I tested it out with a simple square cut.
Thanks in advance for your help