I have found a bug in the Observation Planner in SS6: When I search for galaxies and I specify a time range from 18:00 to 22:00, I get a search result that contains galaxies that are always below the horizon. I believe that any results should be based on the current location, so such results should be impossible. Furthermore, there are galaxies that are only visible from 11: to 12, ie. outside the specified time range, both location and time range are ignored.
This also happens for nebulae, clusters, and stars.