A resort may not receive notification of your reservation until the day you arrive. It depends on the type of auction you won. For most of my weekly timeshare stays, the resort was notified at the last minute. My reservation was in the system only about half the time. The other half they had to check a list of reservations sent over that day. Sometimes the resort had no record of my reservation and I had to present my confirmation in order to get a room. Make sure to print your confirmation and take an copy with you.
I have booked at the last minute, did not have a printer and had to send a copy off my phone to their email so they could print it. Check in can take hours if they have no record of the reservation.
You can always try to contact the resort before arrival, but don’t get worried if you are not in their system. I have always been able to get room.
Skyauction does collect payment in full as soon as you win the auction.
I try to not tell other guests I meet at the resort how little I paid through Skyauction. It could really upset owners since they pay so much just for maintenance fees.