I don't really know exactly how the wait list stuff works because it is probably slightly different at different schools. Seems to me like they probably look at the whole application & interview & when you submitted your application and then rank you. However, honestly, I really don't know what goes on in the heads of admissions people so I'm only guessing.
Yes, I admit that I am a reapplicant this year. Last year I did have a couple of interviews and was placed on the wait list. This year I tried to apply earlier, especially to those schools that I really wanted to go to. As a result, I got an earlier interview date and then I ended up getting an acceptance letter already!
If you really want it, then you have to go for it and work for it! Keep trying and good luck!