MX7 Grouping not working correctly

Question

I am trying a phone usage report that is grouped by phone
number. At the end of each phone number, I want to do a summary by
the phone number. However, the first phone number always appears on
the last phone number’s summary.
Phone Number Date of Call Charge
2133333
01/01/05 2.00
02/02/05 1.00
Subtotal for phone #: [phone]
2132222 01/01/05 1.00
01/10/05 1.00
Subtotal for phone #: [phone]
2134444 01/01/05 5:00
01/08/05 2:00
Subtotal for phone #: [phone]:00
^ ^
Here should be 2134444 the amount is correct
Thanks for your help in advance.

Answer 1

I guess this is a bug with report builder. Try this:
create a calculated field and assign your group name to the
field. Then display that field where you are displaying the group
name.
In your case, create one calculated field as 'temp' and
assign phone number field to it. and then display 'calc.temp' where
you are displaying the group name.