They are different aspect ratios because your Window Layout is 100% custom. Here's what will happen...
Every window will render at 1090x1080, scaled to fit whatever size the window is.
#2 will be shown scaled from 1090x1080 to 830x723
#3 will be shown scaled from 1090x1080 to 276x310
#4 will be shown scaled from 1090x1080 to 280x309
#5 will be shown scaled from 1090x1080 to 276x310
None of these are good sizes for scaling. 276x310 and 280x309 won't even look the same right next to each other in your layout. Overall this will just look bad.
![Smile :)](./images/smilies/icon_e_smile.gif)
I would highly suggest using the Window Layout Wizard to generate a standard style of Window Layout for your team. The generated styles all calculate resolutions for you that will fit your windows on the screen
and scale nicely. You have of course managed to fit them on the screen, but with the type of layout you're doing you can't set it up to scale nicely.
If you absolutely want to keep this layout, then I would un-check "Use Instant window swapping (synchronizes game resolutions)" in your Window Layout. This will drop the scaling mechanic and each window will render at its current size instead; window swapping will be slower and Mouse Broadcasting will no longer line up, but you will get your 3 different sizes of windows, each with perfect graphics.