SQL Distinct

Question

Can someone tell me why the dataset below keeps returning duplicate ContactIds and I am asking for Distinct in the query. I am totally confused.

SELECT Distinct tblContact.ContactID, (tblContact.FirstName) AS MinOfFirstName, tblContact.LastName, tblContact.PhoneHome, tblContact.Location, tblContact.AddressStreet, tblContact.AddressStreetCity, tblContact.AddressStreetZIP, tblContact.AddressDirections, tblContact.AddressPost, tblContact.AddressPostCity, tblContact.AddressPostZIP, tblContact.EmailAddress, tblContact.Gender, tblContact.Spouse, tblContact.Title, tblContactType.ContactStatus, tblContact.Birthday, tblContact.GAP
FROM (tblContact LEFT JOIN tblContactType ON tblContact.ContactID = tblContactType.ContactID) LEFT JOIN tblContactService ON tblContact.ContactID = tblContactService.ContactID
Where tblContactService.ServiceType = 2