User blog comment:DaNASCAT/Technical Update: May 6, 2014/@comment-1192804-20140507191529/@comment-452-20140507212154

Normal captions may also be be inconsistent. Having consistent filenames, and captions, is up to local wikis to work out.

Your point now appears to be "Displaying filenames duplicates captions", which is a great point, but I do not understand why you had not mentioned that previously.