I bought Galciv2 from the website a couple hours ago but haven't received the download instructions e-mail. I looked around a bit and downloaded Stardock Central but when I try to register the game it says the serial key is invalid, and using "Look up serial" says I haven't purchased anything yet.

I'm kinda confused that it would give me an inactive serial key, and wondering if there's something slow/broken. In the past these kind of things are usually more or less instant.