There is a lateral and longitudinal tolerance on Verticality Buck that was historically 5mm (0.015') or 10cm (0.328) that was used to weed out duplicate sections (closer than the tolerances) that we updated with a setting you can control in v5.1 to 5mm (0.015) and 5mm (0.015) using a setting that is on the Template in the Corridor model - change the setting from Default (5mm / 10cm) to Best (5/5) or Best and BL Acrross (5mm / 5mm and we draw a hard breakline across the model as well as longitudinally to better constrain the model.
What this means is that if you have a vertical step n the footing, then make it 0.02' from vertical by moving the top back or the base forward in the alignment, and make sure you change the setting to Best and BL Across. The video at the link below covers this specific subject area. I covered this at PUG a while back.
Click Here for the video
Alan