I bought some olives today, prepackaged ones that are not on oil (only a little). I just opened the package and there are white dots on the olives in certain places, at first I thought it were mites (the ones you get on roses), but it's not. It could be mold, but it's not fibrous, but I can whipe it off. So.. are they still good? I tasted one before I noticed the white stuff and they were the best I ever tasted (there's a remark on the package that they won a best food award and a seperate technology prize for quality and best trade ) In the ingredients it says it contains potasium sorbate as a preservative agent, could it be that what I'm seeing?