If you were to send an email to NSWBDM asking them to adjust their online index to reflect the actual alterations that would overcome the displayed info. BUT

of course you want to know what prompted the changes. The endorsements are meant to include the 'why/how come' official reason/s ... e.g. coroner report or police file or funeral director stat Dec or similar. So perhaps your email could start:
Please ask the senior management team to consider my request outlined in the following paragraph.
I refer to the death registration reference ....../1928, registered in the Armidale district. I have an Official Transcription showing there are a number of significant changes to the offical original registration, even changing the deceaseds name. I am keen to learn more of the circumstances, authority , reasoning and process that caused the Registrar General to permit these changes.
As an aside, the online index does not reflect those changes, would it be sensible to add the 1930 corrections to that index?
Etc
....
And ...
Of course, the offical name stands as that was the name he had become known by.
JM