The last time I made a purchase the $1 credits that came with it weren't credited to my account page, though they show up on the invoice.  I guess something happened with that when you switched to the new site.

 If it's showing up on your invoice like this

 That means you used the credits on that order, so they won't be added to your account... theres a box you have to tick during checkout if you want to save them for later.

ah, I missed that, thank you.