when you are at home, and want a "home" set, you define the internal sensors, that you can walk past when you are at home, as home omit.
If you want the downstairs sensors to be active when you are at home, it will be easier if you put the panel in the hall or landing. Then your home set will be "upstairs, gone to bed" and the first thing you do when you get up is to unset the alarm.
You want a burglar to set off the alarm at once if he climbs in through a broken window, not to start a time delay.
I have a keypad near the front door, and one at the top of the stairs, which I find very convenient (three storey house). My "partial set" (equivalent to "home") is front and back doors, garage doors, hall, so it will activate if someone breaks in or reaches the stairs in the hall. Full set (equivalent to "away") adds the PIR sensors inside the ground and first floor rooms.
Your package is not the same as the systems I use/have used so some of the terminology or options may be different. I have also used four or five different Yale packs.