Thanks for the replies. I don't think it is a threading or bobbin issue because I switched colors throughout the quilting so I was rethreading quite often. What was strange to me was I though that I had the tension looking good but then once I washed it things on the diagonal quilting looked really out of whack while the stitches on the back from the binding (which would be horizontal/vertical) looked fine. I could see it being a needle issue because I used a different needle for the binding than the quilting.