Well first of all, who told you that, the ATO?
Secondly, there were a few people in the late nineties that were slipping through the CIR flight test and being issued a rating
without the required night hours. Now, it seems possible that this may be an attempt to correct that oversight. As to the legal hornets nest you may be poking at, Creampuff might like to comment. A rating issued by CASA, in error and later an honest ATO trying to correct the omission. Mmmmmmmmmm