Lily28, sorry to hear of your difficulties but I am not surprised at all. Here's why…. it's a supply vs. demand thing.
You are trying to book categories of rooms that have a very small availability due to the sheer numbers. On the hotel rooms I think there's only something like 6 or 7 available to book on points. So it only takes that few members that DO own at Aulani to book and those are gone.
The lower points studios are also in very high demand and there are only so many so again, those with home resort priority will snap those up first. I have had great luck with my wait listing because I do not try to get rooms that are either in exceedingly high demand or extremely low supply. I know my odds would be very, very slim to get those because of that dreaded supply/demand.
I always book Ocean View at Aulani so I've had no issues because those do not book up first. I would never try to wait list a standard view at BWV for example because I know they are booked very quickly at 11 month inventory release to BWV owners. But I can tell you I have had success wait listing and getting GV's at resorts where I do not own, but I haven't even tried to get a GV at a resort where I do not own and they only have 6 of them. Not worth my time. I have gotten GV's at AKL for example and I do not own there. Conversely, I bought enough points at Vero many years back to be able to book one of their fabulous Beach Cottages for 2 or 3 nights in the summer months because I knew there are only 6 of them and at 7 months I would mostly likely never be able to get one.
I think if you can possibly swing trying for a slightly pricier (points-wise) room at Aulani you would not hit the same issues you've had. If you can't, then sounds like a great plan to buy those Aulani points, then by banking and borrowing you can triple the amount you have to book what you prefer. Good luck!