You said Redweek handled the whole transaction
I am making the leap that it was "verified" by Redweek
Redweek says:
How does RedWeek verify postings?
We require owners to send a copy of their reservation (for rental verification), deed or certificate of ownership, purchase agreement, and current maintenance statements (for resale verification) to verify that they do, in fact have the timeshare unit or points available to rent or sell. We confirm and clarify the information provided with the resort and/or management company as necessary.
Sounds like they did a poor or non existent job checking the Deed
You certainly were entitled to expect better