If you go into the Activity setup and customize buttons - do the new buttons show up? Try adding the commands to the soft buttons (LCD) so you can see if they're updated or not and test them. Also make sure you're using the correct commands - sometimes 2 or more commands have similar labels and it's easy to get them confused.

If they're not showing up in the activity, make sure you're in the right activity (again, easy to confuse with that many). If all else fails, delete the activity and start over.