My iMac has extra numbers added to its share name. e.g Ali's iMac 49886

Question

I am using Mountain lion, and my computer name keeps changing.
It keeps saying that it is because the name is already in use on the network, but that is not the case.
I use an airport extreme base station.
I am only sing the Ethernet port to connect to the network and wifi turned off.
How do I stop these numbers from adding to the computer name.
Ali

Answer 1

Here is just a sugestion, maybe the airport Extreme thinks that your computer is actually connected twice and hasnt let go of the lease of the IP address. On the old version of Airport Utility you could view attached devices the new one doesnt let you do this but here is a link to the old version.
http://forums.macrumors.com/showthread.php?t=1343156
Linc Davis is right, the user accounts have nothing to do with your machine being names twice. I personally think that your name is just stuck somewhere on the network and the boxes all need flushing.
To do this just simply go round and switch everything off and switch it all back on again and the leases should be renewed.
This sometimes happens when you move from AP to AP.
Thank you
JC