I have modelled a star that has 4 flights, with the first flight going under the 4th flight. I want to adjust the number of treads in the first flight but cannot add to the first flight without it jumping to the outside of the flight over. It's hard ...

Hi, I am editing building elements in sections, and after edits the item dissapears and the section needs to be rebuilt to see the change. This has been happening in every release of AC28. Is there a setting that I can change, or is this just how it ...