InDesign opens in the middle of my two side-by-side monitors

I have two identical monitors, side by side. I always use InDesign in the left monitor, but every time I open it, the window straddles both monitors with half of the windo in the left monitor and the other half in the right monitor. I always move it over to one monitor, but when i close it out and open InDesign again, the same thing happens. This is annoying and I'd like to find out why it happens and what I can do to get the program to open on just one monitor instead of straddling both.

I have two identical monitors, side by side. I always use InDesign on the left monitor, but every time I open it, the window straddles both monitors with half of the window in the left monitor and the other half in the right monitor. I always move it over to one monitor, but when I close it out and open InDesign again, the same thing happens. This is annoying and I'd like to find out why it happens and what I can do to get the program to open on just one monitor instead of straddling both.