The game keeps switching to the other monitor

Summary of bug here.
When i start TowerU the game will automaticly move to the other monitor and none of my other games do this.

Steps to Reproduce

Please list how this bug can be reproduced, if possible. Pictures would be much appreciated!
If i disable or unplug the hdmi cable off the monitor but i dont want to keep doing that

What I expected to happen

The normal behavior.

What happened

The issue the bug caused
It cause the game to duplicate to both my monitors if you can see the picture at the bottom. And i have tried everything i could to solve the issue my self w youtube and still no luck. im sure its just the game.

Notes / Media

Other misc notes about the bug. Picture or videos would be much appreciated!