If a logon account is delegated to a group or domain, their report results will be limited to that group or domain. So, if data is not showing in the reports for a delegated account, then data in the database is not associated with the group or domain. Web Reporter checks the domain (called directory in Web Reporter) during log parsing) during log parsing. So if you don't have the directory added to the log source before parsing logs, it will not be assocaited with the directory and data will be assigned to the "-" directory.
If you want to see which directory contains the data, go to Administration -> Options -> General, and enable "display directories with user and group names", then run some report that include the user names.
Assuming users are assigned to your directory, then getting them assigned to groups is easy. Just create a group filter that you want to run reports for, then update the directory. See KB67630
Thanks for the thorough and detailed response. It is pleasant to deal with a professional.
Thank you very much!