And of course I didn't notice this until after I had completed an entire row, consisting of hours of work. I know I could rip back and reknit the whole thing properly, but I know myself. If I start frogging this baby, I'm never going to re-knit. Too mind-numbing.
So my question is this: Would it work for me to snip the yarn, unravel just that square, and bind up the eight live stitches somehow so that the work can go on without undoing all of this? If so, where is the best place in the square to break the yarn? Then again, I might have screwed up something earlier, too, if I managed to attach the errant square on two sides, which should not have really been possible.
In the immortal words of Winnie the Pooh, Oh bother.