Throughout the series the writers respected the backstory of the town in later episodes about 50% of the time. In this episode however, after Goober suggests Howard run for council, no mention is made whatsoever about Howard having already won a council seat back in "Politics Begin at Home" (season seven).
When Andy and Howard campaign door-to-door for Sam, they speak with Mr. Perkins, but the ending credits list "Roy Engel" as playing "Mr. Perkins."
In the fix-it shop when Andy, Goober, and Howard tell Emmett they're backing Sam Jones, you can see the shadow of the microphone boom on the wall behind them, over their heads, and the shadow follows the person speaking.
Although the group of Andy, Howard and Goober decide to draft Sam Jones on a so-called "No Patronage" platform, as soon as Sam is elected, Howard, Goober and others form a beeline to ask for personal favors, rendering their original platform as insincere, if not ridiculous.
Emmett Clark calls both the owner of the Diner and a fisherman "Harry." The ending credits list "Harry" as being played by "Don Sturdy" (a.k.a. Howard Hesseman) who also played a "Counterboy" in "Goober Goes to the Auto Show" (2/5/1968) and is the fisherman. This leaves the ending credit listing "Lou" played by "Gil Lamb" as being the Diner owner.