I thought I recognized the background of that photo with the kids and the drums! I lost a pair of prescription Oakleys in the lazy river at Atlantis back in 2010. Should've had you check the lost and found.
I lost my ray bans in the lazy river. I did check lost and found and they only show you glasses that match the description of the ones you lost. According to them no one ever lost a pair of ray ban aviators...I just ordered a new pair.
Given the size of that lazy river, it is very possible that they were still floating around or at the bottom, clogging some filter when you went to lost and found. I started with the lifeguards that are positioned around the river, but they were no help whatsoever. They acted like they had never seen sunglasses before... let alone mine. I am not going to ask if anyone tried to sell you a timeshare, because I am almost certain they did.
I had the same experience as you. I'm sure my sunglasses are being pushed to tourist at some downtown market. No time shares offered, I guess they sold out