Sorry to hear about your problem. Btw no one is sure when does Chris do the snapshot. If you are in US e.g., your Thursday might be Friday in Europe time already and that means your order might be not included in the snapshot for last week payment.
My guess is that it's this...
And, your money wasn't really "tied up" in a lost week, because it sounds like you just tried to squeeze in the previous week payment by making a Thursday order... you did get paid for this past week it sounds like as well...