When Alan leaves the toy store after the Commandos destroy it, Link Static watches him leave from a tree across the street. He reports in to Major Chip Hazard, who is so far down the street that he sees Alan biking toward them. However, when the Commandos are about to launch Brick Bazooka from the slingshot, Link Static is pulling on the sling.
Christy appeared to have curly hair in the hostage video the commandos forced her to do, only to have relatively straight hair only minutes later when Alan found her bound and gagged in her bedroom. She was tied up during that entire span of time, meaning she couldn't have been able to fix it.
At 1:28:50, Irwin says that they have to get into [Christy's] house to "wedge the breakers open." Electrical breakers are considered "open" when turned on, and "closed" when turned off. If they wanted to force the breakers to allow current even when there is an overload, then they would actually want to "wedge" the breakers "closed."
In the Fimple's medicine cabinet, a bottle for Phillip Fimple is next to the Sleep Aid. The bottle is made for pills, but has a label for a cough syrup with codeine, and the word "teaspoons" is misspelled "teaspons".
As Alan and Christie arrive home on the scooter they both lean significantly to the side. If they were actually riding the scooter they would have leaned with it, indicating they are sitting in front of a green screen.