Hey..
I saw no one has replied to this yet and I wanted to encourage you a little and try and answer your questions. I know you said that the room thing wasn't working but I was wondering how you were handling her coming out. I'm a children's pastor and all my parents seem to have a hard time when they don't stick with the plan. If she comes out that's ok you can just say hey you want to be fun just point your finger to your cheek and smile. I've worked with children from ages 0-12 and I can tell you 11month olds understand fun. If she doesn't have a happy smiley face then you can put her back in her room. I know it's a long process but the key is patience and persistance. For some reason she feels the angry face gets her what she wants if it doesn't get her what she wants then she has to change her tactic. You just keep smiling so she knows that her angry face doesn't control you. You like to give happy children things but angry children don't get what they want. It's ok if she has a melt down it's not your problem it's hers she has to learn self control. I know it's hard to watch your child cry their guts out but you want her to understand that you don't deserve to be treated with an angry face you deserve a happy child

Don't worry your reseolve is more then an 11 month olds. Just because you may have a stubborn child doesn't mean you're going to automatically loose to her. She has to understand that she doesn't control you you are in control of you. I guarantee that if you're consistant with the room thing she will understand quickly her best choice is to be a happy baby.
Understand that saddness is different then rebelion. You comfort you child when they are sad but when they are using anger or tears to manipulate you that's no fun and you don't want to be around no fun.
I know this is ending up real long i hope it makes sense. I want to encourage you that you're doing a good job. You're a good mother and you have access to unlimited wisdom through God. Just be persistant and consistant and unwaivering in love and you will have breakthrough!! blessings!