Are you saying you placed an object on the bed, cut it, found it to be not enough to cut through, went back & changed the power and hit Print again but did not move the material or move the design and when it cut the next time it was off by 3/8"?
Or did you move the design piece somewhere else on the material, changed the power level and then saw that it was 3/8" off from where you thought you placed it?
If it’s the former, that’s a problem. While the view of the job after it’s run will look offset on the bed, hitting print again but not moving anything should drop the 2nd operation exactly aligned. If it doesn’t that’s a problem. It will look off if you’re looking at the magenta lines in the GFUI vs the cut that you see on the material on the bed, but it will not be displaced if you don’t move anything.
If it’s the latter, and it really is 3/8" and not just approximately, then your machine is out of spec - GF says that at the current state of the software, 1/4" at the edges is acceptable. If yours really is 3/8" off, then that’s out of spec.