Well….. you’re all over the map on this one. Let’s deal with the process issue first.
What is your arc voltage setting? You have yet to tell me that, or to tell me if you have THC at all.

What material is on the table? Mild Steel, Aluminum ???

What is the kerf compensation for the plasma cut. Torch kerf will change with cutting current. This relates to the size of your part. Plasma is just like a circular saw in that you have to take into account the thickness of the cutting tool/blade. Every time you change the current/different size nozzle the kerf changes. Also, plasma is NOT as accurate as a water jet, laser or router.

Why 110 amps? Is there a process recommendation for 110 amps? Does the cut data for your torch/plasma cutter recommend a particular set of consumables with a cut current of 110 amps?

Dimension issues: EASY to check, not always easy to do.
Throw a large chunk of that 10mm on the table and clean it off (or some ¾” plywood, smooth side up) but it needs to be flat, not warped or bowed.
Strap a pen to the torch, TIGHT!
Tape some paper to the plate/plywood. Make certain it’s flat and doesn’t roll if you pass your hand over it.
Make the following drawings:
254mm square - Check for size
254mm diameter circle – check for size and check for round
Draw the largest RECTANGLE on the table that you can [or just the corners ] and measure the diagonals. They should be equal. As in EQUAL. If not, you have a machine square issue. {EDIT} which you may be able to compensate for in the software depending on how severe .
You may need to be a bit creative with your pen setup. In a perfect world you have a spring loaded pen holder or something that would allow the pen to float on the drawing surface.