OK, I think right when I took the picture, I might have answered my own question. But, let's see. When I hand sew, I was taught (by mom, and she's not a sewer, soooo) to double my thread and then knot it. However, it's now causing a problem. See picture...both thread don't come through smoothly. One is always loose. I have to pull it from the back, once I figure out which one is loose. For the time being, I've used a little Quilt basting spray on the thread. Just thinking it would hold the "double" thread together and pull both through tight. I hope this makes sense and someone knows what I'm talking about. Do you quilt double or single thread?