Problem with sum

[#1]

Dear all

I have a big problem and i have not idea how to solve it.

I have a pivot table with a sum function, I have selected only one record and sum is double of the value.

If I put field as dimension i can show that it's different,

Here's an example

PES	COUNT	SUM(PES)
1950	1	3900

But if I put the expression without sum it returns correct value.

PES	COUNT	PES
1950	1	1950

Problem is to solve that because it must be a sum. I'm doing only with one record to found error

Thanks for your help

[#2]

Probably you have a two records about that dimensions.......

....we need check you model....if you can......put here to check....