So far, I think that certain things involved in the calculations of match results, and hence simulation of the matches have been messed up or changed, which explains why in a sudden weaker teams have scored more goals than expected and also why more weaker teams have beaten stronger teams.
Nik posted something that might be related to this thread. You can have a look here: http://forum.topeleven.com/top-eleve...tml#post406599 .