Closed Activities - Related List Column in Account and Contact

Closed Activities - Related List Column in Account and Contact

If you look at the past closed activity under the related fields in either Accounts or Contact module, you can't sort all the activity together to get a timeline of closed activity.  For example, if you log calls and have closed activity, and want to see all of your closed interaction with a contact,  you can either sort by logged calls or sort by closed activity, but you can't sort all of the together in descending order.  

This functionality is extremely important to get a full picture at a glance of your contact interaction.  Please fix!!!.

Thank you,
Boris