The name of the neighboring town to Drago varies from "Twin Falls" to "Twin Forks" at various times.
The cover as used by Echo Bridge for the DVD release does not actually use any images from 'The Howling IV'. The half-face of the werewolf in the foreground is not of any of the werewolves in the film. There is also a small image of three men and a graveyard in silhouette, but there is no graveyard scene at all in the film.
When Tom is speaking to Janice in the parking lot of the the archives, when his back is shown, his lips continue to move during an audio pause between sentences.