Multilevel table grouping problem

@bwong, Thank you for reporting this problem. We rely on issue reports like this to improve Drupal core.

There hasn't been any activity here for 4 years.

Is this still a problem? If so, in order to investigate this we need complete steps to reproduce the issue → (starting from "Install Drupal core").

Since we need more information to move forward with this issue, I am keeping the status at Postponed (maintainer needs more info). If we don't receive additional information to help with the issue, it may be closed after three months.

Thanks!