Oversights like an NPC being in two places at the same time can be a problem in case you wanted to make a more detailed mystery case because an NPC's location could be an alibi that could be used to remove that NPC from a pool of suspects in a mystery so that the player can accuse the right suspect once the other suspects are removed from the suspect pool.
When the game's missing person case showed up and Erika did mention that missing persons cases that the Warg Relief Agency worked on sometimes turned out to be criminal cases instead of warg infection cases, I started wondering who a possible criminal suspect could have been in case it turned out that the missing person was a victim of a crime like kidnapping or murder instead of being infected by a warg.