Wow. Ok. So, after sending an email last Friday, I got an a response back saying that again they didn't have my billing info on file. Called yesterday and talked with a really helpful young lady. This time she made sure that my info was saved into the system. I should now be getting issues 5 thru 8 and DS9 in two weeks.
I tried to subscribe to this, only to have their billing system tell me my address is nonexistent. Received a support e-mail from someone named Rajish Rupaldi who asked for my full (unredacted) credit card number and my SSN so he could 'urgently process manual transaction.' I told him just to forget about it. There's definitely some shenanigans happening in their billing department which my financial info doesn't need to be a part of.