We added the plugin called 'Post avatar' and now when we go into the plugins section of Wordpress we see 2 entries for it.
We went back on the server and double checked, and there is only one uploaded.
How do we remove the extra listing for this plug-in?
The forum moderators aren't the same people who run the plugins. I would guess that you would want to email the automattic folks, or else try that "report a site bug" at the bottom of the screen.
I think the op is indicating that a plugin is listed 2x on the wp-admin/plugins page of his/her install --
webDressing, if you are seeing it 2x, chances are its there 2x. perhaps the files are not named identically.
My bad. Glad somebody around here is awake.