Joanj, in Native American beadwork there is always a misplaced bead or set of them. Sometime they will "jump" out at you and other times it might take an afternoon to find the one. They are called by some the "Spirit Beads" and I was taught this is to remind us that nothing is perfect.
I borrowed the term for my knitting. Sometimes I'll have a "Spirit Stitch" and other times I might have a "Spirit" Row or two. The first complicated pattern I tried had a "Spirit Section!"
I haven't advanced to projects like sweaters and socks. When I do my "Spirit Stitches" may become more problematic