A Book By Any Other Label

I wonder how many people other than me become frustrated by the way online stores categorize books? I'm an eclectic reader. Contemporary, paranormal, romantic suspense, historical--I like them all. As long as they're romance (since that's the genre I want to discuss today). Of course, it's not really so simple, is it? Within each genre there are subgenres. Look in the RT Book Reviews magazine and you'll find sections for Historical Romance, Mainstream Fiction, Teen Scene, Comics/Manga(Manga?)/Graphic Novels, Inspirational, SF/Fantasy, Romantic Suspense, Mystery/Suspense/Thriller, Contemporary Romance, Paranormal, Urban Fantasy, Series Romance and Erotica. Whew, I'm worn out just typing all that. But my point is that within each subgenre there are sub-subgenres (is that word legit?) and it's entirely up to you to figure out which books are the ones you want. Now, I don't know about you, but when I go to an online store to browse for a new read, I get a little nutsy trying to determine whether or not a title is what I'm really seeking. I can type "historical" in the search box, but even then, which of the titles that pop up are Regency period? Which are medieval? And which are the books I'm actually looking for--the westerns? I can't tell you how many times I've bought a book, only to find when it arrives that it isn't the historical I was expecting, but a contemporary instead. Or, rather than being set in the American West, the story takes place on the British Isles. Fourteenth century instead of nineteenth century. Would it truly be so difficult for bookstores to label or place books so that customers don't have to spend hours flipping pages to try to determine settings and time periods? Or better yet, why can't publishers mark book spines more appropriately--not just Historical, but Western Historical, British Historical, Paranormal Historical, or whatever? Tell me, am I alone in all this, or are there other readers out there who feel the way I do?