Another RAD Question

In doing research on RAD, I have read about the two main types -- inhibited and disinhibited. The girl I am hoping to adopt (a 12-year-old who I worked with at a previous job) seems to have some traits of both types. Is this common, or even possible? From what I saw of her behavior on a locked psychiatric unit, she had very poor social skills and difficulty connecting with peers (she basically annoyed them) and showed no empathy, but she did make an effort to socialize. In fact, her "efforts" were what annoyed her peers (she tended to butt in on conversations and monolopolize group discussions, though she didn't seem to realize this.) She was hospitalized due to self-harm threats but only exhibited very minor self-harm behaviors that were attention-seeking (i.e. she would scratch her arm so lightly it didn't even bleed, then ask for the nurse). Her main behavior was anger outbursts that occurred almost nightly, during which she would scream at the top of her lungs, sometimes for hours. This behavior also seemed to be attention-seeking to a point, but it was obvious that her feelings of rage were genuine. Indeed, the attention-seeking occurred first, and then when she didn't get enough attention she would start raging. She does not have any history of physical aggression. From what I have found in my research, I feel that the RAD diagnosis is accurate for her, and she also does not have any comorbid conditions (which I realize is rare). Does anyone else have a child whose symptoms are similar to these?