Plot hole: The bugs are related to a type of mite, and when they are shown under a microscope they look like a glowing lice without wings. The problem is they are swarming in the air so they have to be able to fly - no way to do that without wings.
Plot hole: Josh Exley's 'real' face shouldn't be visible as a reflection on the window. It's not an illusion that he creates to fool people, whereby his real self could theoretically be seen in a reflective surface, but a complete physical change, as we've seen in many episodes of the X-files regarding the shape-changing abilities of the aliens. What his face appears to be while altered is essentially what it is, and the reflection should show as much.
Plot hole: Big Mike was attacked by the creature, because his bulb was broken just for a couple of seconds. It would mean that even if something like this happened to somebody else by accident, this person would also be killed by the creature. That would drastically increase the kill rate in the community. (00:16:15)
Suggested correction: That was the whole point of the creature, to enforce the HOA rules so that no violations occurred, even by accident. Although prior to the attack, Gene Gogolak describes Big Mike as a weak link that had to be dealt with, so the bulb was just an excuse to attack him.
