

Youre gonna be in for a rough time, when you learn about all the rules youll have to deal with. Best learn to accept it now. You can keep fighting it, but it wont lead to a good time.
No, you can rotate a family in revit, anywhere, anyway you like, the problem is on your end. I live in europe, a bit late here, i will send the fixed family for you tomorrow if you can't figure out from this informations
I made a quick video how you can fix your family, you can see it here: https://youtu.be/D0N6_nBnJfk
You can see this flip buttons, how they should look.
I recorded everything after I opened your file, no hidden settings