Net average

Yes but like me your in the uk so you have logged something already for tomorrow. Unless you don’t plan on eating anything else on Sunday then your daily average will go up.

You can set your own calorie goals if you prefer. This is useful if you want to use MFP under the tdee method which is good if you roughly do the same exercise and steps everyday.

The way your working it your meant to eat back all/some of your exercise calories.