It sounds like you just slipped them from one needle back to the other, and like you discovered the working yarn is not at the end anymore.
I believe the original problem was that you had three stitches on your right needle, right?
If it was ME, in that situation I would cheat - slip the last stitch back to the left needle, then slip one stitch over the other on the right needle, then slip that troublesome stitch on the left needle to the right needle, slip the other stitch over it, and continue in normal bind-off.
I don’t know if you can get back to that point now - I know when I go back to try to fix something, I usually just make it worse. That’s more of a personal problem though.