How do Anne and her mother not get along with each other?

Anne Frank and her mother, Edith Frank, were often at odds because Anne believed that her mother preferred Anne's sister, Margot, over Anne.
One example of this is when Anne says, "I feel myself drifting further away from Mother and Margot. I worked hard today and they praised me, only to start picking on me again five minutes later." She goes on to explain that her mother continues to criticize and complain to her when Anne makes a mistake; if Margot makes a mistake, on the other hand, her mother makes a comment or two and then the issue is over.
She also says that her mother speaks to people outside the family about Anne's behavior. For example, she'll tell someone that Anne cried or that she was behaving a certain way. Anne was a more private person and makes it clear she would prefer that her mother not do such a thing. She also says that her mother brings up the cat they had to leave behind, Moortje, and this brings Anne sorrow.
Another problem Anne has with her mother is that she allows Margot to read a novel that she doesn't allow Anne to read because of the difference in their ages. Anne says her mother doesn't understand her. She writes, "At moments like these I can't stand Mother. It's obvious that I'm a stranger to her; she doesn't even know what I think about the most ordinary things." She says her mother carps at her but that Margot doesn't have to deal with her sarcasm.
Anne indicates that she prefers her father and that he understands her. She does say, though, that he often sides with her mother and sister.