I have tried purchasing CE and every time it tells me there's a stray snipe in the gears, and they are working on fixing the issue, and that my account has not been charged. I'm playing through steam, not sure if that's an issue.
I have money in my steam wallet,
I've tried it both on Windows 7 and Mac OSX
Steam Overlay is on
Anyone else having this issue?
This tends to crop up from time to time. Though this appears to largely be a Steam related issue, though if you mail support about billing they may have some advice for you.