Just an added thought. You only have Paypal as payment and no other options. Could this have something to do with it? For instance, I have three options, so obviously someone picking up, or sending a money order could not pay immediately. I don't know how it worked out that I had one or two that said she had to pay straight away.  I also wonder if it has anything to do with people buying via their phones, which often seems to cause problems. I may be way off the track here, but who knows??