When I see "3 / 6.5K suppressed" on the dashboard it looks like I had 6.5K emails suppressed. I know only 3 were suppressed but my eye just catches the "6.5K suppressed". How about displaying the information at the top of the screen like this:

5.4K delivered / 5.5K sent, 10 failed / 5.5K sent, 3 suppressed / 5.5K sent