This DOES happen. They often do this when they are training new character performers and use them in places that are a little out of their element and out of huge guest flow (not to overwhelm them). More than likely this is a new CP in training. A week ago we were walking by the gate to the World Showplace building in Epcot when it opened and 8 CP character performers came out (Mickey, Goofy, Jafar, Brer Bear, Pluto, Queen of Hearts, Winnie the Pooh and Pigglet).
I've seen Cinderella by the International Gateway and Pocahontas by the gate near American Adventure before too.
*Notice Jack was near the old bandshell off the path behind Character Spot. Out of the way for most guests*
Nothing to worry about. :wave: