Other options:

  -The name of the wireless in a database and picking up
   the first one, could not be fixable changing the router
   name or ip address as it is already recorded somewhere
    -Same for other routers or ip address in the neighbor
  -Maybe it's not their fault but someone else did it on 
   purpose, e.g. take the cell phone and manipulating it
   inside a room with stolen/faked/forged data somewhere
   else and wrapped in a metallic sphere to block signals
   so only the forged router can be used?
  -Even more crazier: put a router really close and put
   there a vpn/proxy?