I think we've all done that before. I am working on a "Gemini" pattern and my 3 set of blocks were cut wrong. I keep looking at them and looking at them and I still don't know how I did what I did or, really, what I did wrong. Thankfully the quilt takes 42 sets of 2 blocks each and I have lots of fabric so it shouldn't be a problem. I always buy extra fabric because I'm prone to cutting errors and I still haven't cured myself of it. Oh well.....