I am using Crystal Reports XI.  I am trying to develop a cumulative line graph charting 3 date fields - Prepare Date, Review Date and Approve Date.  I inserted a group on Prepare Date with running totals and charted the cumulative running total values.  This looks good; however, when I try to add the cumulative Review Date (as running totals) as group 2, the values on the line graph are exactly twice the values of the Prepare Date which makes sense because the primary grouping (group 1) is Prepare Date.  Because of this, I am thinking charting this way is not possible.  My second option was to overlay graphs, but this doesn't seem to be working either.  Has anyone had any success with something similar?  Thank you in advance!