Yes, now that I have recovered from the shock of the news, I am pretty sure that BOS have got it wrong.
To be eligible to receive an ATAR, the requirement is that 'your course selection must include at least six units of Board Developed Courses, two of which must be English; three courses of two units or greater; and four subjects.'
I fill all of these requirements as far as I can see. Also, in relation to VET courses, the NSW Students online states 'VET courses contribute towards your HSC and Australian Qualifications Framework (AQF) VET credentials, recognised by industry and employers throughout Australia. Some of the Board Developed VET courses have an optional HSC exam so, if you choose to sit the exam, your results can also count towards your ATAR.' I do two VET courses, but only one has to count towards my ATAR, and the other one should have no influence over my ATAR at all.
But if anyone knows/thinks differently, please comment... Although not getting an ATAR isn't the end of the world - I'm not going to University, just want it as an indication of my performance against the state - I would like to get it if possible!!