The rules for the range of teleportation seem inconsistent; how can I fairly deal with this?
The Teleportation talent is described in the core book as being of extremely limited range without exception. To quote (emphasis mine):
You can teleport yourself short distances using your Unicorn magic. Teleporting is difficult to control and can sometimes cause more problems than it solves! Teleporting yourself is Difficulty 5, and every few feet after that adds an extra 1 to the Difficulty.
Failing a Teleport test means you teleport to somewhere you didn't intend, though it may still save you from trouble!
RAW from this section clearly indicates that this this ability can only teleport you short distances, measured in the double-digit-feet range at most, making it more akin to D&D's Dimension Door (though even still less effective than that) than a full-fledged Teleport.
For starters, this seems inconsistent with the source material of the show. Highly skilled characters within the canon proper are able to teleport on the scale of miles, or even around the entire country (in this case, as a result of a failure).
More officially, it seems contradictory with the published adventure The Curse of the Statuettes. In this story, one of the main antagonists, Moonbeam, is highly skilled at teleportation, and the adventure suggests that she use it to escape the PCs when she needs to retreat (emphasis mine):
Moonbeam will make use of Force Field and Stun Ray spells to keep the PCs at bay. If they close in on her she will Teleport to safety. After a brief encounter, Moonbeam will grab the wagon-pony statuette with Telekinesis and run away! If the PCs capture her, she will escape using Teleport.
The limited range of teleport as given by the core book does not seem sufficient to be able to be used as a Free Escape ability; displacing yourself 5 to 30 feet is hardly sufficient to escape persistent PCs! Without significant contrivance, this will not be enough to exit the scene... well, unseen!
Are the rules for teleportation intended to be different between PCs and NPCs, in order to allow villains a contrived method of escaping scenes while limiting the ability of players to abuse it? (I would not appreciate this ruling, but I would at least understand it) Is it reasonable to give the ability a more substantial growth curve relative to Difficulty rating and success level?
As a result of Zak's answer and suggestion to create our own rules, I came up with the following custom solution: http://www.giantitp.com/forums/showsinglepost.php?p=22531662&postcount=3