If your quilt isn't completely square, start by pinning the layers together in the exact middle. Then pin the quilt on each end. From there you can ease the fabric together by pinning the rest of it together like crazy!! For me, I would use more pins then you have in your picture, but then I'm a pinning fool. :wink: A lot of times you can gently ease any excess fabric into the quilt by doing it this way.
And if nothing works, sometimes you just have to give in and rip it apart. It doesn't look like you need to do this though. I'd definitely try to ease the fabric together by pinning first before doing anything so drastic as ripping it apart.
Clear as mud?