I'm trying to summarized data on travel and work hours on some jobs.  When I select the insert summary and tell it to sum the travel hours in the report footer it gives me some unreal number.  I went back through the jobs and manually totaled up the hours in the report just to verify it and I know that the summary is wrong.  How can I troubleshoot this?

Have you tried using a running total and put that running total on the detail line so that you can see that it is adding correctly?