Mutant Food

I've been collecting what I classify as "Mutant M&Ms" which for whatever reason (perhaps a radiation source in our work lunch room) seem to be very prevalent in the packages of peanut M&Ms. For a while it was only orange ones which made me hypothesis that it was a genetic disorder associated with the genes for the orange pigmentation but then I found several blue ones with similar characteristics so I can only assume it is must be an environmental cause. I've read about mutant frogs being a sign of an environmental contaminant so this is likely the cause, but why just M&M why not Skittles or even regular M&Ms. I thought maybe it was because M&Ms are bioindicators but then I found this site with other effected species. MoFA

As i side note my collection has been slowly disappearing. Could it be someone is stealing them as part of an elaborate coverup of a worldwide epidemic of food mutation? I should say any more.