Someone posted about some suggestions for changes that they would make. I added to that post and suggest this change too.
As far as I have been able to figure, you cannot reorder them. And, as long as you haven't spent too much time programming the remote, then you may want to reset everything, but write down all of the device codes for your equipment and only program in the TV during the initial setup. Then, go in and manually configure each of your devices in the location that you want and then enter the correct device code.
Unfortunately for me, I have spent waaaaay too much programming the thing to do what I am suggesting that you do. I wish someone gave me this advice before I got to where I am now. So I am stuck with the device buttons where they are.