The max amount of fighters you can have registered is 9 now. At 1st it was basically 12 for you since it was ruled that you could register 3 in each league but you can only upload 10 fighters to fighter share so we might as well give you the same cap as the high level players so its not confusing.

If you already have more than 9 fighters register you need to choose your top 9 and scrap the others. You cant scrap a fighter who has already fought for one who hasnt. Fighters who havent fought yet are the 1st to go. I added a text area in your user profile where you can put the names of the fighters you have registered. Please take the time to fill that out.