no
say you got a uai of 100
your preferences follow
1. law @ usyd 99.6
2. arts @ uws 70.00
(as said before)
1st round (could be early round, main round, whatever) - you get an invitation. Should you REFUSE this invitation, you will not get an invitation on any other degree until the next round starts. Each round that goes by, less invitations are given, considering places are taken etc.
Exception to this is that you put down both HECS and fee-paying courses. eg
1. law HECS
2. arts FEE
3. medicine HECS
you can get an invitation in both law and arts, and you'll have to dismiss one of them. But again, if you choose to refuse both, you will not get another invitation til the next round.
Hence why you should be choosing your preferences carefully based on what you want rather than uai based.
EDIT: yes casmira is wrong/didn't phrase it right. If you got a uai of 100 you won't be getting 9 invitations to choose from.