Leave in old seam?
Sometimes I sew a seam a little too narrow and have to redo it a bit wider, and I usually sew the new seam and then rip the old seam, but it's occurred to me that as long as I'm pressing the allowance to the side that it wouldn't cause any problems if I left the old stitches in. Does anyone leave these in? Does it cause any problems?
Obviously if I'm pressing the seam open or if the initial seam is too wide then I have to remove the old stitches.