Komodo dragons, being both venomous and endangered, cannot be kept as pets and certainly would not be allowed in a school.
After Phyllis pushes the stuff off of the dresser, 90% of it falls down the side, when they switch to the next scene with Reggie, the stuff that should have been on the floor next to the dresser is in front of it.
While teaching about mammals in the elementary school, you can see that Rube has a very visible injury to his lower lip (split/swollen,) presumably because actor Mandy Patinkin was suffering from such an ailment in real life. However it has already been extensively established that reapers injuries heal almost instantly, so this would never be the case for Rube.
Mason keeps saying he's never been anywhere, but his character is English, and while it doesn't say what city this takes place in, it was somewhere in America. So he had to travel from England.