I also thought the LCD's were at night, where the Bach'ette spends a few hours with each. Molly & Jason had the massage, Melissa cooked Jason dinner in her room. With Jason/Jesse/Deanna, they were in the guy's rooms and they each gave her little gifts (like scrapbooks almost).
I think the waving goodbye isn't because they aren't going to see her before the FRC, but because the guys are leaving to go back to their hotels on Bora Bora where they will get ready for their LCD.
The MTP days are probably before the LCDs. According to the filming schedule in the sleuther thread, once in Bora Bora, it goes in this order with each being on a different day :
The sleuthing filming thread is off by a few days (May 5 vs May 8 or 9 ) but maybe Cash's source was right that she rejected Chris on the LCD, they did a dummy rose ceremony with him, she spent a few days with Roberto and then filmed his LCD(I mean FRC). Or maybe not, but she just asked for a few days after her LCD's to make up her mind for sure. really did put a few extra days between Chris' LCD and Roberto's .
I think one will go shark feeding because it's one of the parts of the ABC Tahiti giveaway and almost all the details match things they've done in Tahiti.
Last item: I read on some Hilton flyer forum a few months ago that the FRC is at the Nui spa which is high up on a hill (like the above pix show) , and one of the forum commenters said they had to build a platform to get to it. So maybe the stairs and walkway we see Ali on was built for the event, which would mean we'll never find pictures to match it.
I'm also getting suspicious that the abc medianet photo of the empty platform with just the rose on it is taken after both guys have left and is to signify her broken heart.