So today another monitor came in.
I now have a 3840x2160p and a 1920x1200 monitor. The UHD is positioned on the left, and the 1920x1200 is positioned on the right (No room to switch them up).
I'm currently on trial, and i'll buy the software once i get all this to work, so i have 4 problems:

1. I bought this 1920x1200 screen to do things on the side while i play other games on my UHD screen, however when i start a full-screen game, everything on the right screen is moved to the left instantly, it doesnt matter if they're fullscreen on the right screen, if they're pinned to the taskbar, or anything. I've read that everything is moved to the left screen, so i set my right monitor as if it were on the left and vice versa. This works, the screen stays but now i have to move to the left to enter the screen to the right, this is annoying and i was hoping there were any other possibilities to fix this.

2. The fact that one monitor is higher resolution than the other, means that (depending on where i tell DisplayFusion the position of the monitor is) my mouse will only travel to the other monitor on either the top or bottom of the screen, but not the entire border.

3. The ''prevent window deactivation'', that i use to travel to my other monitor while maintaining a fullscreen game, almost always bugs out. i wont be able to leave the screen with my mouse and all it does is break alt+tab. I have to open task manager and close the DisplayFusion process to get out of it.

4. Is it possible for me to run 1 screen (including the taskbar) at 100% scaling, and the other on 150% scaling? a lot of space is wasted and items look big and blurry on my 1920x1200 monitor because i put windows on 150%, without that function everything would be too small to be readable on the UHD monitor.

If these issues don't get resolved i wont have any use of my second monitor, it's life depends on your help.