Removing votes

I forgot to click the option to register IP numbers as votes .. as such, three of my recent polls were spammed by one 2 IP numbers and the votes have gone astray.

I've removed the votes in the database jos_jcp_votes - they all came at pretty much the same time .. but they dont appear to be registering as taken away on the frontend - they are still showing as voted cast.

How am I supposed to do this with the extension?

Cheers