Originally Posted by Yoshi

I am still learning and i've found that when this happens it is a combination of any of the following: the tension being too low, my hands moving too fast and my machine speed being too slow. I've also found that it's much more likely to happen on poly batting than cotton.

Being the pro that I am at FMQ I can tell you that a seam ripper will take that right out and you should be able to go over it again.