Well that's the inherit discontinuity in Voyager for you.
They take an episode like this where the wallpaper is set up from the subconscious of the character tapped as the episode lead. That's a cluster of bread crumbs that should be picked up by subsequent episodes, or those seeds should never have been planted.
You know like the time Chakotay and B'Elanna made out in a dream, or Tom said that his entire life revolved around boats and sailing.
Voyager continually started stories it had no interest in following through.