it seems some of the inputs are not sorted according to the definition
I got this input in one of th random tests
['CodeWarriors', 0], ['Founders&Coders', 0], ['Quorans', 0], ['CodeCademists', 0], ['Eden of the East', 0], ['Max Headroom', 0], ['FSociety', 0], ['Public Security Section 9', 0]]
which clearly ['Quorans',0] should have been the last element in the league_table
it is possible to sort the whole table everytime. But that does not seems to be a wise approach.