Is this a complex profile beam?
Either an existing one or one you have created.
If so then in the profile editor you will probably find the the fill for the beam is not on the origin (x).
The origin will become the reference line for the beam - the blue line you are seeing.
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