I generally don't get worked up about such stuff. Sometimes historians, critics, etc., ascribe names to things that didn't even have names when they were new, and the names stick.

A lot of people would say Henry Fielding wrote "Tom Jones" although the original title page said "The History of Tom Jones, a Foundling." Would you call them wrong? I wouldn't.

If you search Mudcat, you will find lots of references to "Pills to Purge Melancholy" but the title page called it "Wit and Mirth: or Pills to Purge Melancholy; Being a Collection of the Best Merry Ballads and Songs, Old and New...." I'd blame D'Urfey himself for choosing a subtitle that was cleverer and more memorable than the title—or maybe whoever decided to set the word PILLS in larger type than anything else on the page.

It does annoy me when people who post at Mudcat carelessly misstate the title of a song, although the song has a known and easily verifiable origin, or misspell the songwriter or performer's name, when that, too, is easily verifiable. I've seen people do this even when the correct information has been given earlier in the same thread.