6. you can find the setting for inbox feature at Traveler Settings > Partner Options > Inbox Options > Allow request inbox.
7. As i said before, our filter working by AND method that if your select other location, theme will find all your activity that have both location. in fact, you does not have any activity have that both location so there are nothing to display.
4. You can use Poedit to change that text.
1. In order to get that, firstable, go to Traveler Settings > Styling Options > Header > enable Sticky header option.
The second, please follow my image to change theme style.