I always realign my fabric first thing. No v notchs in my strips either. I was also alternating them. I've just never came across this before. The reason why I was thinking it was the fabric was because as I was sewing it it is stretching and kind of gathering. I'm not saying it the LQS fault more so that the fabric is just stretcher than I'm used too. The only strip quilting I usually do is Log Cabins other than that I do blocks so this is new to me. I think I'm going to end up having to square up each block.