Yep, you're right they just responded to my e-mail saying that. They did end up changing that $5 off for on-demand tv to a $5 video game credit though from the first e-mail I sent. I just tested it out by putting spirit tracks in my cart. Not bad I guess.
I preordered Bioshock 2 and only got a $5 code off On-Demand TV or something. I e-mailed amazon and they said they fixed it but when I try my code on a video game in my cart it only takes $5 off. I emailed them again yesterday but they still haven't replied.