I feel your pain. I have a 16 YO daughter that is an honor student, and excels at almost everything she attempts in life. Glowing reports from school come in almost daily. Other parents beg me to let her come live with them. Her hair and makeup are always perfect. Her clothing is always matched and unwrinkled.
Yet her room looks like a bomb has gone off in it! Her clothing is always thrown about. She leaves toothpaste shrapnel on the sink and mirror. Borrows my things without asking and then I have to go into the "war zone" that is her room and try to locate my stuff, with no luck most times. Her idea of helping out around the house is to load the dishwasher, every other day or so. I have told her that she acts as if she is the star and the rest of the family is her set crew, that never gets any credit. It's really like she is two different people. LOL
This just started when she turn 16. I'm hoping it will pass, before I go off the deep end. She stays out of trouble and does great in school, so I am trying really hard to be understanding and pick my battles. Although, it is hard not to feel disrespected.