YOU HAVE ALREADY VOTED IN A SIMILAR WAY

Hey everyone. I am having an issue with something i have never had happen before. I just logged on and i loaded the trending page. None of the post had the blue up vote symbol highlighted. I start up voting and and its saying "you have already voted in a similar way....???? It continues as i go down the list and none of them are highlighted. Can we take a look into this, I dont know who to bring this to so help is appreciated. Thanks-@comfortgenius