Yeah, it currently doesn't have any awareness of numbers, and whether 6 is higher than 5, etc. If the version number doesn't match
exactly then it will tell you to update. It's also easily confused by additional letters or words in the version, eg. if the author wrote "v7.8" in the version box when they uploaded to WoWInterface, but the TOC file says "7.8" then it will tell you to update. Hopefully this will be improved in the future, but for now you just have to let Minion borrow some of your own brain power and look before you click.