Not carving as deep on the right side

I have done a couple of signs and I noticed that it doesn’t carve as deep on the right side of my work. It’s all level double checked it. anyone else having this issue?

It may be level to the floor, but it it parallel to the gantry. That’s the important part. I am going to guess that it if lower on the right side. A better way to say it is maybe the gantry is high on the right side. Check it out. If it is a small amount, you can skim your waste board and solve the problem.