Hi @sheepdip82 !
I am wondering if you are hitting some sort of bug, since you have so many columns. Based on the table chart vis documentation, you should be able to rearrange table columns in a visualization (not the Explore data table) in any way. It sounds like it’s somehow mimicking the data table column order rules.
I suggest reaching out to support to open up an investigation and file a bug, and let them know your findings (thanks for testing the issue so thoroughly!)
I hope that is helpful!