The expected margin that has always been communicated to us is...

The expected margin that has always been communicated to us is 19%.
30/06/2016 $332 / $1,761 = 18.9%
31/12/2016 $542 / $ 3,830 = 14.1%

Doubtful Debts as far as I'm concerned are part of your cost of trading, so I would adjust this to 31/12/2016 ($542 - $68) / $3,830 = 12.4%

R&D Cash Received $115, but not in P&L - was it taken up last year?

Other Expenses 30/6/2016 $350 31/12/2016 $417 - the increase was a bit more than expected?

No explanation for the above items mentioned in the report.
Add this to the inconsistency in their classifications that I have elaborated on previously, which made it impossible for me to provide an accurate break even forecast.

I'll be nice and say this is disappointing.