I believe I've been banned. I was hitting it very hard, doing at least $3K/day. I was able to buy single MOs, and some of the CSR's at my primary store will let me do multiple transactions. So I don't think I'm totally frozen out, but unless it was a system glitch or I violated the daily limit (which I don't think was the case), I will probably have to cut back my volume but won't be entirely shut out.