Hello,
Sorry to hear you are having issues. First, if you not on Fences v5.81 yet, please do update to this version. Make sure you reboot after the installation. Next check do the troubleshoot steps mentioned in the first post here: https://forums.stardock.com/528229. Make sure to switch your Layout auto-adjustments to "Store my layout on a per-monitor-configuration basis" and follow those steps. Try those and report back.
Thank you.
Basj,
Stardock Community Assistant.