It does look like you have a yarn over. Is it from where you divide the stitches to make a loop? I sometimes have the yarn over the needle and don't notice till the next time I come to it...or I've knit it and have an extra stitch.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper