I currently have Invisalign and I went in for a check up and my orthodontist said my bottom teeth weren't tracking properly with my top teeth. So then he said he had to put metal braces on them because Invisalign isn't working. They are not crowding and don't need rotating or anything serious so is this common? Or should we be doing another remold for new trays to better track my bottom teeth? I'm very unhappy with metal braces.