Is it a complex profile wall?
If so you can try setting the position of the opening reference line in the profile settings.
There is a bug when a complex profile wall is used.
The 2D symbolic display of the window does not necessarily match the actual 3D position of the window.
Change the window to 'Projected with Overhead' and you will probably see it is in the wrong position in plan as well.
I could be on a complete tangent here though and may be confusing the issue even more.
Here is one post illustrating the problem.
I am sure there are others and I have reported it as a problem.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10