more specifically, the reason they aren't counted is because their titles have more than one word in them
I don't agree, numbers are not words, only if you spell them out. Abbreviations aren't words either. That technically would make "40" a non word title as would MLK.
Hyphenation, again debatable, if Boy-Girl were separate words, why hyphenate at all?
I would also like to know why U2 would incorrectly split Ultraviolet into two words. Ultra is not a word, unless it refers to the espionage cryptonym.
Golden
Eye is one word for sure, defined by the movie title.
It might not be included, because it's Tina Turner singing. But I feel it should be included, as it is as much a U2 song as say, "She's a Mystery to Me". That they have yet to perform GoldenEye is irrelevant.
Not that is matters much since none of these is top10 material to me anyway, but others might find some obscure gem somewhere that (almost) fits the definition. Those "out of the box" ideas are what makes threads like these interesting. And I think people should have the freedom to make a case for anything similar.
The biggest issue is probably with subtitles in brackets.
It's not part of the title proper, it's a subtitle, that's why it is in brackets.
The problem is that songs like Pride and Stay would start to dominate lists.