[Superman]

Very good catch! How do I get it to use G55 as my offset? I do not want to start machining at my machine coordinates offset at G54. I wondered why is was doing strange stuff.

You need to understand the process/steps from design, to creating toolpaths, to post-processing, to tool setting, to running the machine.
Each have the possibility of creating errors, how big the error gives a proportionally sounding crunch.
It happens to us all.

If you are unsure of how to set the work co-ord system in Fusion. You can edit the NC code file that you have in #1 post from G54 to be G55.
Remember, that repost-processing the code will change it back to G54.

This is one way that ppl have multiple setups on the one table( if table is large enough) ie vice1 uses G54, vice2 uses G55, etc, etc