Continuity mistake: As 5 women are walking through the park several extras can be seen in the background. Camera angle switches to aerial view, and the 5 women are the only ones in the park. (00:27:05)
Continuity mistake: When Angie tries to smuggle cake out of the cafeteria, she puts away her tray and then tries to slip after the guard. When he stops her, she turns to make her way back to the now empty table; in the next shot, the tray is on the table once again. (00:16:25)
Take a Break from Your Values - S2-E11
Continuity mistake: When Piper calls Alex she is drinking wine till the glass is empty but in the next shot the glass refills by itself.
Answer: You would need to be more specific as to which inmate to get an answer as to who possibly belongs in the mental ward. In general; usually the only mentally ill prisoners who go to the mental ward are inmates who show obvious psychotic breaks like Loli and crazy eyes as, with the conditions of prison, it's often difficult to tell who is mentally ill and whose frustrated from the conditions. Many of them are also only there temporarily. Crazy Eyes, first example, was in the mental ward. Her mother fought and won to get her out.