Yup, thats it.
I think way back when I did the RET test the maximum bonus you could get was ten marks, but these days it says that your RET score 'replaces' your UAI score, so that example you just gave is correct!
Perhaps if it was explained this way...
If your UAI score is within ten marks of the 2005 UAI cut-off (the cut-offs for people who finished their hsc in 2004...) then you can use your RET score for admission purposes rather than your UAI score. This means your RET score still needs to be...