I’ve noticed that when you add new columns after you’ve already closed and loaded your data, these columns always show up at the end of the table in table view. One trick that might fix that is to disable the load, which removes it from the model (Close & Load), and then enable it again. That will update the model schema, but I didn’t test this myself so I’m not sure…
However, you can’t visualize a table’s view directly in a Power BI report, so the order of the columns shouldn’t really be a problem. You have complete control over the column order within a table or matrix visual on the report page.
As @Melissa said, the order of the columns doesn’t matter betweeen Query Editor and Data View. The order of the columns also doesn’t matter when appendiing in Power Query/M. If you do want to reset the column order for personal preference reasons, I posted a hack a few years ago that may be of interest: