I know we've talked about things like this before however do to issues it causes with features and such is it possible to have some kind of warning or alert either for the player or the site admins when Main Character Ranks and Account Ranks differ?

In my opinion these should always be the same. If not it can prevent people from signing up on calendars and using forums for guild only and such. The problem tends to arise when the guild roster is imported via GRSS and promotions have been done in game.