That is really weird. I also had problems with Google Checkout -- they kicked me off the program for adult content and stopped me from making sales. But, they did send me the money for the book sales I had already made.
I suspect that it's a computer glitch -- I can't see why Google would wantonly screw you over like that. Unless they're super-cracking down on the adult content, in which case a few instances of the word "sex" on your sales page might be enough for them to close your account.
I have my tech guy setting up payments with PayPal right now, which I think is the best solution until I get a merchant account. They do take a percentage, but it's pretty low and worth it to not have to deal with Google headaches. I'm really looking forward to having the shopping cart set up, so I don't have to worry about payment logistics for a long time and can concentrate on writing and blogging.
On a side note, I'm re-starting the positivity challenge today! Got any tips for that?