Why is requirements module's modified date is not being updated?

However, most users equate a Requirements Module to a Requirements Specification (not a container of requirements artifacts).  So if any of the visible content in my Requirement Specification changes (even if the contained artifact was changed outside the module), then I would expect to see the Module's modification date updated accordingly.  If you look at the Audit tab for the Module, it includes all changes to the Module content.  So why should the system show me everything that has changed in my Module, but not update the modified date accordingly?  Seems inconsistent...

It would be good to get Kirk's perspective on this.  In my opinion, it is a real usability issue.