As this can only be done in one long paragraph I'll try to help in multiple posts. “(some basic commands added by the setup process were wrong - and you can't delete them in the 'edit' page - WHY???)”.......... They can be reordered and any commands or delays YOU add can be deleted or moved, but if you need to DELETE any of the commands set up automatically at the very beginning you have not set the Device up correctly. Check your configuration settings till you don't need to delete anything then start adding your own commands and delays as needed. This will be what is causing your switching between Activites to not work as they should (assuming you have CEC turned off on everything). I have 14 devises and 10 Activates and they all switch without using Off.