Not going to mention the vendor yet, if at all, as I'm not sure what ties to the market admin they have or whatever. But I placed an order on Hansa on Friday. It arrived yesterday, all was well. Wasn't able to get on the dark net until this morning to finalize. However, the order was already finalized and only would allow me to leave feedback. How the heck does that work? I've placed about a dozen orders on Hansa so far and I've never had this happen before.
Edited for spelling.
If it is a high level vendor, and the delivery time was set to 1 day, the auto finalize timer is really short. Go look up the experience system for vendors to see how the auto finalize timer works.