I've seen uncensored versions of censored artwork and flagged the censored versions as inferior to the uncensored ones.

I checked the flag history and have seen many instances of this sort of thing but the censored picture isnt deleted.

Am I doing the right thing?

Depends, if the artist has released both versions we tend to only keep the uncensored one, if the censored one is a fan edit then we keep the original work as well.

It also depends on whether or not the artist is okay with the uncensored ones being uploaded. I do recall late last year that someone uncensored some of Kayla-na's piccies and uploaded them to get back at her for some transgression or another; the uncensored ones were removed.