Duplicates and Summary Count/Distinct Count

Hello Again -

I have grouped on {Asgnmnt.GroupName} for the different departments and have added this code to the details section and suppressed it to remove the duplicates...

Here's the code....{CallLog.CallID} = Next( {CallLog.CallID})

My question: Is this the best way/method to remove duplicates?

I also going to add a Summary to count the days for each group - should I use 'Count' or 'Distinct Count' to get an accurate count of the days for each group?

Thx.

G.