BB policy prior to 12/2 was all GC purchases would not give RZ points until the GC was redeemed (w/ points going to the redeemer). Looking at the transaction history you bought a game and a $25 GC (which is the proper way of giving free GCs so the company doesn't get screwed on returns) and paid for it with a $50 GC. There's nothing wrong in the math, just in the way it's displayed. In fact it looks like they're giving you more points than are displayed on the receipt...
EDIT
Looking at my own reward zone it appears to be the same with all BB transactions (I don't like the new look one). All items are listed at the top, with the purchase method being listed after tax. Anything after tax should be what your point total will be for the transaction...