Applications keep switching monitor

[WildMonkey]

Hi, I have 2 monitors and a TV hooked up to my PC with a Nvidia 1080.
Resolutions as follows:
1. 27" 1440p, DisplayPort monitor
2. 24" 1200p, DVI monitor
3. 65" 4K, HDMI TV

The problem is that every time I turn on the TV all the windows switch around, like if monitor 1 has Chrome up, then it will instantly switch to monitor 2, etc... Sometimes it seems like it has an order, like all open ups switching to another monitor, sometimes they seem random.

Are there setting I'm missing or some other thing I messed up? TIA

 

[kasakka]

Check if primary display changes when you have the TV on.

 

[WildMonkey]

Check if primary display changes when you have the TV on.

It stays the same in both Win 10 Display Setting and Nvidia Control Panel.
The order is always 27" primary, 24" third, 65" second. I don't know why that is but I've never been able to change the numbering.