Construction Project Management Software Resources

The auto-save feature is fine. But the need of going back is felt must most of the time while using the software. However, it is not understood why Primavera versions are not incorporating the feature of 'go back'?

If time span of project is 12 months, P6 will give you a cumulative cash flow till 12th month. What date of the month does P6 take as a cutoff date when we draw S-Curve. Actually when I draw it manually in excel it gives different values and when I schedule P6 for my monthly reports it give different values. Forexample: if you schedule P6 for 3rd month schedule % is 15.52% and when I check it from activity usage profile it is giving the value of 16.21%.