To get the desired result, create a calculated field similar to the following:
Then, place this on the view. Right click on it and select Edit Table Calculation...Choose Advanced for Compute Using. Place all fields in the Compute Using box in the following order: PARTY, Order #, Day of Timestamp, Type. Choose Field: Number of Records, Sum, Ascending, click OK.
Then, choose Deepest for at the level, and Party for Restarting every.
Hope this helps!