Flair question

Not that it matters but what is the difference betweenRacer AM Racer EX AMA Pro I assumed AM means amateur and EX expert, but those are not analogous terms. I always thought novice is to expert, as amateur is to professional.....Also to the mods.... this is an international community so maybe the AMA part is unnecessary?....and isn't AMA dead and replaced by MotoAmerica?Sorry for the ignorance :P, just been wondering what level people are at when I read their flair, and wondering if mine is even right....For me it helps to know a commenters level to know how much salt to add to the dish. via /r/Trackdays https://www.reddit.com/r/Trackdays/comments/9qkz8i/flair_question/?utm_source=ifttt