Thanks to a reader's feedback about the commenting experience, I was inspired to muck around Blogger's customizable features.
I've now set comments to be accepted through a full page redirect (which means no popup window, which might have been messing with people's browsers, popup blockers, etc.). If this doesn't work, I'll try having the comment box embedded in each post (you'll see a space at the end of a post where comments may be left).
My gratitude for your patience, and especially for the sleuthing help from LH of She Sews Seashells. Y'all should check out her blog--it's funny, intelligent, and full of gorgeous photographs, crafts (that's the sewing part), baking, thoughts on being a stay-at-home mom (SAHM), and of course, her adorable kids.