Thanks for your sympathies, everyone!!
I frogged, went back and started again- counted a million times, placed markers, and figured out where I went wrong. DUH. In row 3, you K1, (Ktog) to last stitch, K1. You should then have 110 stitches. Instead, I K1, K2tog, K1, K2tog.............all the way accross the row. Sheesh. That's what I get for not double checking my stitch count at the end of that row.
Oh well- now it's over and done with, and I learned a valuable lesson!