I know you can "reorder activities" but I don't see a "reorder devices" button in that spot in the "devices" setup. I definitely have complaints about not being able to reorganize the custom buttons within an activity, as I discuss here
. That link also provides information on how to contact Harmony. Take it to 2nd Level Support. I would imagine that it gets more attention the higher it starts.
And I know what you mean about things going on and off when you don't want them to. I made a separate activity called "Power" that is pretty much just power on/off for each of my devices. So there's one that says "TV Power" and one for "DVD Power," etc.
Then, I just tell the Harmony how I want it to handle power for each device -- somewhere in there, you can tell it to NOT do anything with the power for each device, probably to address issues just like these. So, basically, you can make your macros for whatever you want and not have it mess with the power of devices. Creating the activity will allow all the buttons to be configured for the activity, and you won't have to switch back and forth between devices.
So, call Harmony up if you feel so inclined. I really
want the activity soft buttons to be re-orderable. Good luck with the power thing. That really bugged me in the beginning as well...