The position of bed lining (pillows, bed sheets) in the bed room is inconsistent from different camera angles.
When Uday returns to bed room after being possessed, one of the pillows changes color from from light green to white.
The position of arm chair outside bedroom changes position before Uday closes bedroom door and after he opens it again.
During the sequence when Ragini and Uday realize that Priya and her boyfriend are at door, a mobile phone is seen on the bed. But when Priya and her boyfriend come to bedroom the phone is no more visible.