Questions about Confusing Plot Points (Spoilers)
1. The blood in the bathroom. Why couldn't the adults see it? Was it real, and they were under mind control not to see it? Or was it fake, and the kids were under mind control to see it? They keep saying none of It's visions are real. So was this an exception to the rule and It sent actual blood up through the drainpipe?
2. If It eats kids, why were their corpses still intact and floating? If they were just in a trance like Bev was when they found her, wouldn't our heroes have wanted to try and wait for them to land and wake them up?
3. That was a pretty bold move for Bill to shoot his "brother" in the head. They don't know everything about It's powers and they had just seen floating kids' bodies in the air. It was possible It had the kids in a hibernation sleep and he was mind-controlling and animating the real Georgie's body who was still alive.
4. What happened to It's head at the end? Why did it look like it was disintegrating into confetti?
5. Did Bev kill her real dad or was that an It apparition? At the end we hear she's going to live with her aunt so it either implies she killed him and needs a new guardian or she just decided to get away. But either way, that seems like she got of that situation really easy at the end.
6. We're told that It requires making kids scared to be able to overpower them, but it seems just the opposite in some cases. Georgie wasn't scared enough of It and he trusted him enough to get in close. Bill was terrified of It in his basement but was able to run away from him successfully. Why couldn't It pursue Bill a little further? There doesn't seem to be a lot of consistency in when It is able or decides to kill.