Can it be because I have enabled Escalation emails in GenericAgent.pm?

From: otrs-bounces@otrs.org [mailto:otrs-bounces@otrs.org] On Behalf Of Darshak Modi
Sent: 15 March 2013 AM 10:39
To: 'User questions and discussions about OTRS.'
Subject: [otrs] Ticket Escalation

Hey guys,

May be this a silly question, but I am evaluating OTRS and  I am not technical that strong.

I have created demo tickets, with Queue based escalation, Now I had closed the tickets, their state is new and closed successful.

Still I am receiving escalation emails for those tickets? Is it correct behaviour or some configuration mistake?