I suspect the selections are the same for all AK Lodge guests, rather than being customized to the specific room category - I suppose it couldn't hurt to check it and see what happens. At worst, they offer you a paid upgrade that you can decline.
I will admit that I read the thread because a couple weeks back I asked the very question it seems you can answer - what *are* the options for online check-in at AKL? In fact, "Sunset Savannah" is exactly what we want, along with "close to pool", because I hope to be close to the fitness center.
Can you recall the list? Usually it includes "ground floor" and "upper floor", as well as a couple that are specific to the resort.