GDA2020 transformation issues

Hi,

Transforming from MGA94 (using the GSB GDA94 NTv2 to GDA2020 option) on known points does not give the published values. It's in the <10mm range, but I'm puzzled as to why there is any difference?

See below screen shots;

The published values are here;

PDF

Calculated comparisons are here;

Geodetic Survey Marks.xlsx

Any ideas?

Thanks.