In this episode, Emma's house is in town. However, in "The Manhunt", Emma's house is way out in the country.
The coat/hat rack in the background between Barney and Andy is clearly blocking the calendar. When Aunt Bee arrives at the courthouse, the rack has moved and the entire calendar is clearly visible.
The word "Enlargements" is misspelled on the sign hanging in the drug store. It incorrectly reads "Enlargments".
Andy actually rings up $3.23. For less than a second, you can see the "$2" tab pop up just before the "$1" tab pops up.
In this episode, Barney has trouble memorizing and quoting rules, but during the entire run of the show, Barney could quote penal code numbers and the offenses they referred to.