Movie Review In a Dark Place

Anna is working as an art teacher in the city, however she fails in the big city, and is given a job to teach a young girl by the name of Flora. In the movie though it appeared that Anna played the role of the nanny and the art teacher. I'm not really sure, it was too boring to figure it out fully, and too lame to want to rewind to get all of the answers.
In A Dark Place seemed like an interesting movie, solely because I based it on the DVD's box cover. It looked like a gruesome horror movie surrounding children. Usually there is nothing creepier than evil kids.
Once I popped the movie in though, In A Dark Place, just dragged on and on, and nothing made much sense.
In the beginning Anna begins to sense that their is something deeply wrong with Flora. Only I never sensed it, or were given any examples of why she was labeled a disturbed child by Anna. So the kid doesn't think finger paint is lady like. What's so wrong about that?
Shortly after establishing a relationship with Flora, Anna gets a letter from some private school that Miles (Flora's brother) is expelled from the school. When Anna goes to pick him up, she asks why he is expelled, but is not given a reason.
As a viewer you assume the reasons will be brought out to the table later on in the movie...only...the reason is never brought out.
After the children are together, I began to wonder if Miles was the evil one, he seemed to glitch in and out of a good kid, and into an evil kid. Only you just couldn't be sure. I was left scratching my head most of the time.
By the middle of the flick, Anna then begins to have mental break downs where she thinks she is seeing ghosts of dead people who once lived in the house. Just when the movie began to get interestingly confusing, Anna goes and has a lesbian encounter with some weird broad who lives in the house. I was thrown off track. What the hell is going on?
The kids are evil? Miles is evil? The lady who sucks boobies is whack? Anna is a freak?
The movie progressed, and Anna gets more wacky, so much that you are not sure what the hell is going on. Is she the evil one?