Search only displays one person

Search only displays one person

I am using the Outlook plug in and when I try and add an email to a contact and search for the last name of a person it only brings up one person e.g. a single result and I am not able to display more than once person to add the email to, which btw is not the person I am searching for but the person that is displayed does have the same last name.

Is this a known issue? or am I missing something here?