IrishRose - let me make a suggestion - I had a similar problem with a quilt a couple of years ago, not your pattern, but every
time I would lay it out I had your problem. Here is how I solved mine, and perhaps you can too.
I have a digital camera and I took pictures of it when I layed it out, then if I wanted to change any of the blocks around, I had a picture to go by, to see where I wanted or needed to change things, needless to say I took a lot of pic. and put them on the computer, so I didn't have to print copies. If you have a digital camera, you might want to try the same thing. If you don't have one, perhaps there is someone you know who does and take some pics. and see if that will help you.
Now every time I get ready to lay my quilt blocks out I take a pic. of them, and then I can rearrange and know what I have already done with them. Good luck hope things work out for you. Gerbie