Editable Comments Plugin problem (Please help!)

Hello, I am testing out the ‘Editable Comments Plugin’ (http://julienappert.com/realisations/plugin-editable-comments) but for some reason it is allowing any user to edit the newest comment. So USER2 can edit USER1’s post.

Try it out: http://www.team-vanity.com/tournaments/cups/test-3412341234
Go to the last comment, by USER1 and you will be able to edit it. (This happens when anyone is logged in too).

Does anyone know why, and have any suggestions on how to fix this.

Thanks,
Elliot.