Re: Changes to invoice templates are not saving
I was able to get the issue resolved with a call to support. They didn't actually explain to me why it was not working, but as I recall I went into the template editor, told it to remove the date column, clicked the "Done" button, and then rather than looking at the preview in the editor, I went to the Sales > Invoices section, and when I applied the template there and previewed it, it was correct.
I hope this helps! FYI I was able to recreate the same issue on both my Mac and on a PC, so it's definitely not a Mac-only issue (at least it wasn't for me).