A good camera adjustment would mean making a background photo in the 3D OpenGL view and walking the camera around until things seem to line up.
The so-called 3D alignment tool is hampered by reality: rarely are photos taken without some crookedness or distortion, preventing an accurate line-up.
Also, rarely do context photos have enough cues or are they showing level sites, so there is still plenty of guesswork.
Have a calm spirit and take your time. There is a logical solution that can be achieved by eye.
Dwight Atkinson