The description in RuneQuest 6 for the Sorcery spell Teleport says that it returns the target to its origin at the end of its duration. That seems not very useful for long-distance teleportation. However, this appears after a section on using Teleport during combat to basically "blink" around. Despite that, nothing in the wording binds the statement about returning to only the "blink" use of Teleport.
This is counter-intuitive enough that while reading it I was certainly expecting to read a clarification that the automatic return is limited to that combat use. The earlier mentions of using Marks or Projections to set up Teleports over very long distances does seem to imply that one-way teleports are an intended use of the spell.
I can't imagine that one-way long distance teleportation is intended to use the Enchant rules to make the duration permanent, as that makes it a once-in-a-lifetime permanent investment of many Magic Points.
I checked the errata and did some searches to see if this had been discussed online already, but turned up nothing.
Can Teleport be used one-way, or does the target always return to its origin when the duration elapses?