Can't stream on 1080p... You better not be using Firefox or Google Chrome! If so that's your problem.
Surprised I just found this but if you're using PC and Chrome to watch Netflix, YOU WON'T BE ABLE TO STREAM IN 1080P.
Google Chrome: up to 720p
Firefox: up to 720p
Opera: up to 720p
Safari: up to 1080p (on Macs running OS X 10.10.3 or greater)
Microsoft Edge: up to 1080p
Internet Explorer: up to 1080p