I have done the same thing before. It never really bothers me. Don't the Amish intentionally put a mistake in their quilts to show they are not perfect? Besides, once you get the pieces all together in the quilt, I seriously doubt that the "error" would even be noticeable. I made a double Irish Chain quilt several years ago, where one of the blocks was out of place. My LA'er pointed it out to me, but it had already been quilted, so it was not going to be changed at that point. Even though I now know that it is there, I still have to look for it to find it, so it is not likely that anyone else would notice. (Unless you point it out)