Is there a way of reversing the muscle suture after tummy tuck?

I had a tummy tuck in May of 2012. Prior to surgery my abdomen would sink into my body when sucking in my belly. Since my surgery it hasn't. When i crunch up, instead of having two rows of abs I have a long muscle down the center of my abdomen that looks like an ear of corn under my skin. My guess is that this is due to the muscles being tied together. Would you find that to be a true cause? Is there any way of reversing the muscle suture to allow my muscles to contract inward like they used to?