Are you sure HCA is turned off?
Despite the games played at a neutral arena, the teams on the right seem to win a lot more than the teams on the left. That said though, I am only going off this years and last years final and semis
EDIT: Should have been to everybody
On the BB3 semis i think it said that it was on neutral.. on the domestic cups it didnt have the same notification although from the settings the game effort box only allowed for PO Normal or PO Crunch time (although i guess that doesnt prove if HCA was effective.