How to address ghost who moves runner (rug) constantly?
Center runner
Point video recording device (camera, cell phone, etc.) at runner.
start recording.
review recording.


If cause proves to be supernatural, make lots of money selling the recording, buy a new house, problem solved. Perhaps open up the floor under the moving runner and see what's (or who's) buried there, etc. or sell the house as a real verified haunted house for an extra high price to someone who wants such a thing. Or open a haunted B&amp;B...

Otherwise, double-sided carpet tape or various pointy things (such as mats with points to stick into the carpet and the runner.)