This is an artefact of the import, that different addresses may have the same location and these were imported as such.

https://gitlab.com/alantgeo/vicmap2osm/#stage-8---imported-addresses-sharing-the-same-location-manual-review

As part of the post import I created a MapRoulette challenge for people to help manually address these.

I checked street level imagery between 840 Traralgon Creek Road and 1000 Traralgon Creek Road and couldn't see any other signposted addresses in between, so unless we have any other information we con probably just delete 890 Traralgon Creek Road, what do you think?