If you use the "Generic Activity" option you will have much more control over how the activity works. It takes a little more time to set up because you have to assign every device & button manually but it works well and I use them all the time.
Example: On a Samsung TV with Smart HUB. My watch TV activity controls the cable box but I need TV functions to navigate Smart HUB.
1. Setup "Generic Activity"
2. Add: TV, AVR
3. When it asks you which input the TV needs to be on there is an option for "I dont need to change the input on TV"
4. Change input on AVR (if needed)
5. Add Smart HUB button press at the beginning of activity.
6. Assign every button that you need.
You get the idea. It gives you much more flexibility for your setup than the pre-labeled activities.