Airservices do not always get NOTAM information correct even when it is given to them correctly.
EG: The NOTAM said Goulburn NSW YGLB was closed due flooding.
YGLB aerodrome reference level is about 35 feet above the town of Goulburn, population 32,000.
The weather in the area was CAVOK and it had not rained in ages, so a few slight reasons to doubt the veracity of the NOTAM.
Quick phone call to Airservices who said the NOTAM was correct and had been properly supplied by the ARO - what would I know?
Turned out it was South Goulburn Island airport YGBI in the Northern Territory which was flooded.