Same here, I had a 7k drop from the previous week, where I lost my home game against the team in the first place of the other conference (by 11 points only), but where I won the other league game and I won the cup game that put me through to the last 16 round against my rival team (which I had lost the previous regular-season game)...
I was expecting at least a small increase due to that, but definitely not a drop in merch.... also no player was sold or bought during this time period.