You're a bloody legend mate, thank you!I’ve just been looking around online for you mate and you are right, it’s bloody hard to get an answer on this, but I think I may have found it:
In the right side column, it lends me to believe that you will still get the $1500 (before tax) even if you work multiple jobs, but you can only claim it once (ie for one employer only).
Interestingly, it also seems to state that you should receive your full time wage if higher than $1500/ft.
I did only skim read, so have a good look yourself. Hope this helps mate.
Judging by that it looks like you're right ( here's hoping) and yep I saw that in the gov FAQS that companies are actually meant to pay your current salary if you earn over 1500, however there's no obligation.
Thank you again mate!