A BIG Mistake

Quilt Camp is over and there is nothing pressing that I have to work on this week. I have some UFO's that need to be finished because they are taking up space so I set up my room for machine quilting. I decided that the first thing I would finish is my grandson's T shirt quilt. I made it in 4 vertical sections and they have been all quilted for a while. I laid they all out side by side they way they would go together and picked them up and folded them one by one in order and stacked them up with the one on the far right on the bottom. Today I sewed the first two sections together and hand stiched the batting together where it was trimmed to butt together and hand stitched the seam on the back and stitched in the ditch along the sashing to finish the quilting. Then I picked up the next section............ Oh no, no, NO..........  

There should not be 2 sashing strips next to each other and there should not be a space with no sashing strip between 2 sections.  I mixed up the two middle sections.  How could I have done that?

At first I thought I could just move the sashing strip to the right edge but I have trimmed both of those edges through all 3 layers but I would have to add a narrow batting strip and piece a narrow strip on the backing. I think I will take out the stitches between the two sections that I just finished putting together. That is 4 layers of stitches, 2 by machine and 2 by hand. I think in the long run it is a better solution.

However..........I am going to put it away till tomorrow and

 THINK ABOUT IT FIRST.