Voting

Hi, I got an issue with voting. We are using your plugin in an internal wordpress installation where people are voting different colleagues action in order to increase engagement and our staff implication.
We are using IE 7 and Firefox. The logging is ste for IP&cookie. The IP is static not assigned by DHCP.
My issue is that some of my colleagues, never visited the site and when they try to vote,they can’t.They get the same message like the people that already voted.
In the same time, the setting is that you can not “unlike” something that you like. For some is ok, they can not unlike, for some is not. They can like and unlike as many times they want.The settings are the same.

https://ww.wp.xz.cn/plugins/wp-ulike/