Suppressing does not impact totals, sums , averages, etc.
The data still exists and will still be incuded unless you explicitly make it excluded.
By placing the Goal ion your GF2 it only displays the last row of data. However when you go to SUm it it still sums all the rows.
To exclude the extra amounts use a Running Total (you can also use variable formulas if you want but I use RTs).
The below asumes you have 2 groups
G1=TEam
G2=Employee
If that is incorrect and you are only grouping on employee bump these up one grouping...
Create a RT
Name=TeamGoal
Field to Summarize=Gaol
Summary Type=SUM
Evaluate=On Change of Group (select Group2)
Reset=On change of Group (select group1)
Place on GF1
(RTs have to be palced on details or footers. They do not work on headers)