Hi man! So I'm trying a few different floor fixes, basically the oculus software tends to forget where the floor is, and you cant reset it until you turn guardian back on. So one fix is to turn guardian on, set floor, turn off, then start the app.
For your second question, this miniature view is intentional. The system should be prompting you to re-align with the anchor points. So you might have to push down on the right thumbstick, and then place the controllers down on the floor / whatever position you chose in the setup.
Hope that makes sense! Have fun with all the stuff in there!