Duplicate entries when using Campaign or Notes as Related Module

Duplicate entries when using Campaign or Notes as Related Module

I have created showing a Report which shows lead entries belonging to a certain campaign.

The filter I used: Campaign Name is Fax01

Some columns shown: First Name, Last Name, Address and Member Status

At first, the report works perfectly well.. but then I later on noticed that when I update the Member Status of a lead (for example, named Dianne Valenzuela) from Planning to Send Fax into Fax Sent.. the entry for Dianne Valenzuela the appears in the report becomes duplicated (one with Member Status = Planning to Send Fax and the other = Fax Sent)

is this a bug?