Yes, I understand and I have had the same problem... The revert button is not available on some templates.... I don't know if this is a recent version bug or what. I dion't recall ever having this problem before but yesterday I wanted to remove some old templates and couldn't.. Same thing, the revert button was not available to push unless I went into the template and changed something. If I pressed revert after that the template would just go back...
This has got to be a bug with this new version. Templates should be easy to delete...