So I have been tying away. I've got about a dozen y2k's, and 3 woolybuggers(still waiting on an ebay auction with all my tying materials) in my box. I've noticed something with my thread as I tie. It seems the actual thread spreads out or fans out occasionally. I am using fly tying thread and I have seen it on two different thread colors. Is this something I am doing wrong or is it normal to see?

Thanks for the help.