I take it your white horizontal lines are your sub-summary parts.
Just create a summary field in your table named "CountDate" that gives the count of any field in the table. For instance your date field.
Put that in your sub-summary part. And sort by date like you did now.
Made a quick test file:
i see what you are talking about but i dont want it to count each field. i want it to give ma total count of appts a rep has run when sorted by dates. ex: if John Doe ran 135 appts between feb 21 2012 and april 6 2012, when sorted it will give me: 2/21 he ran xx, 2/22 he ran xx, 2/23 he ran xx - april 4 he ran xx, apirl 5 he ran xx, april 6 he ran. I want a total count of all the dates
Now I see what you are talking about :)
What you can do is make a second table occurrence of your table.
Connect them with a cartesian join (X-Join) and get your sum from the second table occurrence.
I made a new version of my file:
That way you can see it.