I support Jojo's choice because love can change. But I am disappointed that she didn't choose Sun-Oh, But when you give it a deep thought Sun-Oh and Jojo were both selfish and betrayal towards one another so right there I shall not pick and choose.
After watching Episode 11, I have begun making assumptions about who called Seok-Hoon towards the end of the episode. Hopefully its Ro-Na but if not it could just be another dream,