I'm trying to texture this sleeve, and I'm getting a weird stretching in the middle section. I don't know if this has anything to do with it or not, but I did "morph" this section of the sleeve to stretch it and make it longer (it only came to mid-elbow). Any idea why it is doing this, if it has anything to do with my "morphing" it, and what, if anything, I can do to fix it?