When my 180 mark arrived I could not do anything online. Times were showing up, but when I clicked on them to reserve, it took me back to the main page. I tried everything. So, I waited until 7 am and called. I got BOG first try, and I went for CRT first, then BOG. I think the trick is to not waste valuable time trying for a reservation the first 2 or 3 days of your vacation, but go straight for the middle/end. There is way more availability, because you have to remember that those whose dates came to the 180 mark a few days before yours probably snagged reservations for the first few days of your visit.