Other mistake: With the major exception of the check-out counter, the used book store has few discernible shelves. Books are literally stacked on top of one another (perhaps 50+ high) with no space between the piles. The books are not even aligned. It would be almost impossible to find a book or try to remove one without all the books falling. These can't be real stacks of books. (00:30:24)
Other mistake: After surgery and throughout Henry's hospitalization, how much his head is wrapped (completely or partially) plus the amount and location/size of separated bangs vary numerous times. Once the head is wrapped, there shouldn't be much, if any, changes in the bangs because the tight bandage would hold them in place. The tight, completely wrapped head with no bangs showing immediately after surgery appeared intermittently, which doesn't make sense. Henry's head should have been shaved but was not. (00:37:29 - 00:44:16)
Other mistake: Henry and Peter got on the school bus in the morning and Susan picked them up after school. Parents often drive their kids to/from school, even when busses are available. Busses usually aren't available for students within short walking distances to school. The day Peter looked "lost" when school let out, Christina walked him home. This indicates the school is close - close enough that Susan wouldn't need to speed to home and back during the talent show or take 45 minutes to execute the plan. (00:02:48 - 00:51:39)
