Finder windows moving from other monitors as soon as the computer hibernates
Found this apple discussion thread about your issue:


  First you need to open Mission Control and add a new "Spaces" now just
  called a "Desktops" to both screens. You don't need to use these new
  Desktops, they just need to be there. With two monitors you end up
  with "Desktop 1" and "Desktop 2" on the first monitor and "Desktop 3"
  and Desktop 4" on the second monitor.
  
  Right click the Dock Icon for that application you want to launch in
  the second screen and choose Option. Now you can assign the
  Application to always open on the second Desktop.
  
  Without having multiple Desktops established, this option isn't
  available. It looks like a bug to me.