I would recommend you to refresh the MAC Add Table and try and then you can try removing port security command from any access port..and then check..

ok.. is that true for any other access port u have other than this port on the switch..?

Aalso what is the switch model and IOS type..

Hmm..that is strange..can u pls send the output of the show mac-add command and also running config..of any other interface that has dynamic enteries next to it..

Also pls refer to the attachment as well..