Problem in report generation

Hi all, here is the situation: I’m generating a report based on module “Opportunities”, using fields “Account name” and “Amount”. In the condition I have “Account name” --> “Equal To” --> “Value” --> “5D Investments”. In the Opportunities table, there are 3 different entries for “5D Investments”, but the report shows me only one row of those three.
I hope that someone can explain to me this behaviour.