Continuity mistake: At the reunion at the Jade of the Orient Mike shows the others scars on his chest that the werewolf gave him. However later when their venture into the house at Neibolt Street is told, and the werewolf comes for them, it never touches Mike at all.
Suggested correction: It was Ben that showed the werewolf scars not Mike.
No it was Mike.
Continuity mistake: Mike's father mentions that Henry Bowers is the worst bully at Mike's school. But Henry went to Derry Elementary and Mike to the church school at Neibolt Street.
Trivia: The worst guard at Juniper Hill is named Koontz - after Stephen King's rival in the horror genre.
Question: Why does It leave the picture of Georgie in 1985? The only reason I can think of is to alert the Losers Club, but It doesn't want them to come so that makes no sense.
Answer: It does want the Losers to come to Derry. If you remember, Mik tells that by the site of the Bellwood murder, It painted the words "come home, come home, come home", a clear message to the Losers. In the next part (chapter 10, part 5), they also speak about how It would want them back, to exact revenge on them.