Keywords - learning curve or glitch...?

I googled 'handmade shoulder bags' this morning, and was happy to see, on Page 2, a Folksy link containing eleven pages of said items. However, I was not so happy to find that my shoulder bags weren't on any of these eleven Folksy pages - despite the fact that all three words were in my keyword lists.

So I did some investigation and experimentation and eventually found where the problem lay - I'd separated each keyword with a comma as instructed while listing, ie. handmade,shoulder,bag. Big mistake, as it seems that certain words, like 'handmade', can stand alone, but 'bag' and 'shoulder' can't - the two words must be separated by a space, ie. turned into a keyphrase. Now I've done that, my shoulder bags appear on those eleven Folksy pages. (Oh, and I've added the single word 'bag' as well as 'shoulder bag' - just to make sure I've covered all angles!)

This seems utterly bizarre to me. Is it a Folksy glitch, or just another example of my ongoing struggle with all things webby...?!?