your order seems correct, but I think 'payment window' is typically up to the seller, and usually maybe a week or 2 at most (many/most pay faster)? the '30 day window' is used for the purpose of the probation list, which you can research in another related thread.
Sometimes a n00b will ship first and then get paid, to establish some cred. I do not recall anyone having any problem with this, however, there are lots of people that have been burned by sending n00bs scads of money for what look like smokin' deals.
It sounds like there may be a lack of communication of basic details in this case, so