You told the resort about the mistake, and the Closing company, but did you inform the seller?
Here's what I suspect happened:
Seller had 2 or more weeks for sale at same resort
You purchase 1 of those weeks
Somehow TWO deeds were recorded in your name
one of those 2 weeks was the correct week, and you are happy with it.
The other week was not supposed to be recorded in your name AND it had incorrect information
You paid maintenance fees on both weeks, since the resort considered it yours. You used the week in question.
The seller didn't even know the resort considered the week as yours, because nobody said anything to the seller. Perhaps the seller owned more than those two weeks, and didn't look at the maintenance bill carefully enough to realize it was missing. Perhaps the seller didn't do anything knowing someone else was being billed.
It took 11 months for your weeks to be recorded, so I wouldn't be surprised if it took 11 months for recording of the corrected deed - that leaves 9 month in question. Perhaps the seller finally found a buyer for this other week, and proceeded as if nothing had happened - because if the deed transferring that other week to you was incorrect, the county should never have recorded it in the first place. When the correct deed was recorded, the resort resolved the problem on their end, and listed the new owner.
How many years of maintenance did you pay?
How many weeks were you able to use?
If those numbers match, you are out nothing, and shouldn't worry about it. If you paid 2 years, and only used one, you should contact the resort and demand they refund the 2nd year of maintenance.
Do you have a copy of the deed for this second week? You might contact the county and ask them what really happened? Seems to me, in order to record that second deed, it needed to be signed by both you and the seller - did you sign two deeds? How did the resort determine that this was your week without a deed signed by you?
Does this closing company submit deeds electronically to the county - so the county never sees the actual signed document? This would explain both how the week ended up in your name, and how it was taken out of your name.
Either way, you don't legally own the week, even if the resort recognized you as the owner - they are not the ultimate authority of who own it, just the authority over who gets to use it. Contact them and the closing company about any weeks you paid fees for and didn't get to use. Either the resort should reimburse you, or the seller, if the buyer got to use those weeks.