Thank you, George! I was relieved to finally learn that the "Y, Somme" anomaly was NOT, in fact, a glitch in ancestry.com's software. It was really just user error.

I'm not at all certain that our hosts at ancestry.com have ever realized what the source of the "Y, Somme" mystery is. (I wonder, do they read these forums?)

But regardless of the occasional difficulties involved, I still really appreciate those drop-down lists of suggestions for place names, because they do save considerable time in data entry. But of course the downside is that it can get us going too fast for our own good...