Here's what didn't make sense...
1.) After experiencing nights of super creepy paranormal activity, Katie and Micah continued to sleep in their bedroom, with all the lights off, and not even a TV on in their bedroom. If I was in that situation, I would've turned on every single light in the house, turned on the TV, and maybe even put on some music in the background. Anything to distract me from the demonic entity. How could someone be terrorized by a demon in the middle of the night, and then feel comfortable enough to sleep back up in that bedroom again? I mean, what did they expect? Of course the demon is gonna appear again.
2.) The demonologist was useless. He didn't provide any useful information or tips. In fact, I'd say he made the situation a bit worse. And plus, that cracked me up when he returned to the house, and was basically like, "Whoa, I can't be here. I gotta go." I mean, dude...you're a demonologist. That's your job. That's what you do. Why bother even returning in the first place??
3.) That house was obviously a super creepy place to be. And yes, I know...the demon would follow Katie. But they could've at least stayed the night in a hotel, drive around at night, slept in their car even...anything to avoid sleeping in that house. In fact, returning to that house was just a bad idea to begin with.