It happen, now you can buy scouts of 7*.
Simply your server don't have enough teams of your level, to complete all the leagues of level 11 and put you in level 12.
If you tank the season, next season you will be again in level 11, if you end 1st to 7th you will be in a level 12 league next month probably.
Is a good moment, as I said, to buy scouts if you are thinking in tank, because will have 8* or more next season if you are thinking in this strategy.