When Clover is talking to Dr Hill over the radio she doesn't release the button, which means she is still transmitting and should not be able to hear him.
"The character Abe takes out his phone after 13 nights and watches the recorded videos with his friends. Can a phone record for 13 days without the battery running out?"
In Night 12, all of the characters die except for Megan, who follows Dr. Hill through a door and into the mining tunnels below town. When the dead characters are revived for Night 13, they discover that Megan is not in the house with them. That means that Megan did not die in Night 12, and therefore survived until dawn and should be out of the time loop, while the other should be dead and not returned to a Night 13.
On Night 2 characters are shown dying in the order that they drank the water. But Megan, Max & Clover die entirely out of order so Megan and Max can witness a death and Megan can see Dr. Hill.