I don't understand how to get Quiet to only attack specific targets that I tell her to and nobody else. When I assign her to a sniper spot, she just randomly attacks people. She killed a guy who was A++ in R&D and Intel right in front of me. I was pissed.
You don't put her on a sniping spot. That means you give the attack command which means she automatically attacks everyone. Same goes for the "Cover Me" command. Just let her scout. If you want her to take someone out aim at him and chose the "Take him out" command.