Good morning! Thank you for posting in the Final Fantasy XIV Technical Support Forums.

With regards to your concern, the issues you are describing would be more suited for general gameplay hints & tips. Unfortunately, we are unable to provide any official support for such concerns and advise that you check various resources such as web sites, video guides and asking fellow players within the game and forums here to see if they may have information to share.

In general we may suggest double checking your configurations to make sure that both your system and the game are defaulting to the correct and desired monitor. Should the issue persist, please try these additional general troubleshooting tips:
- If you have not already, please try limiting the FPS in-game.
- Try switching between fullscreen and borderless windowed mode.
- Run the game as an administrator, if you use Steam you may either run Steam itself or the game itself as an admin.

Please note, fullscreen mode will try to use the resolution set by your system. If you feel this is a bug, you are welcome to submit a bug report in the appropriate forum section.

Thank you once more for visiting the Final Fantasy XIV Technical Support Forums!