Hello,
When I put 2 windows with visible grid at the same scale in the same plot, the grid doesn't match so I understand that the plots are not at the scale displayed.
https://drive.google.com/.../view?usp=share_link
From the example you are showing on the google drive link, I cannot see what you are reffering to. Have you cheacked the Paper size in Page Setup? That should match on both plots, in order to be printed in the same size.
You can see that the selected window (in red) is at 1:50 and there is another plot window (with fresnels and profiles) where I display the scale that is also at 1:50.
You can also see that the grid displayed in the two windows is not regular the same way so the two windows are not the same scale
I realize now that you want to show two sections of the same plot on one sheet. It seems that both grids actually are the same size, just not centered,
Have you tried moving one of the sections sideways using the (red) move tool (arrows pointing in all directions)?
It's centered at X:0 and clearly not the same size !