Problem with filters in list

Hi,

It seems the filters in lists are having problems. If I try to use the filter : Rating - 1 or greater, it works, I've got all the items I've rated, but if I try Rating - not rated, all the items are displayed, including rated ones...

I've tried with Chrome and Firefox and with several lists (this one for instance: www.listal.com/list/autres-joues) and I've got the same result.