Per the problem 1, will let our tech department check the database of the samsung TV for you. For problem 2, It is recommended to create a macro button under Activity, such as channel 247, then create a macro to execute the commands of the three keys of 2, 4, and 7. You can add it via key favorites or the new macro in Assign key for X1-Remote. Selecting key favorites which is only displayed on the screen. or select the assign key for X1-Remote and it will be assigned as a physical key (which can be controlled by one key on the remote )