OK, I think that these are fixable..
I would try it on one, maybe the least offensive one.. and see if you can work it out.. then move on to the next one...
Here is what I would do...
remove the stitching about 6 inches on each side of the pucker...
lay the quilt flat on a table and pin baste along the quilting line about every two inches and about 1 1/2 inches away from where you are going to sew. Do this on both sides of the quilting line. Turn it over and check to make sure you havent bastes another pucker in...
By the way, when I pin baste, I put all the pins in while the quilt is laying flat, then go back and close them, so I dont distort the back
Put it back into the machine, and using your walking foot, quilt it again..allowing the machine to do the easing of the fullness both on the top and the bottom..
Let us know how it works..