Below is somewhat of a technical answer.
Bloom refers to the slow rising of "essential oils" to the surface of a cigar. It first shows up as tiny (almost microscopic) crystals on the surface, and can eventually make a cigar look slightly "dusty" with a whitish finish on the surface. Not only is it harmless, some prefer to see a little bloom, as an indication of strong taste.
Mold, however, is a fungus, growing on overly humidified stogies. It is recognized as white, gray, or blue-green "fuzzy patches" with a definite dimension to them. Mold spreads by spores, so it's important to get rid of any moldy cigars immediately, before they contaminate your other cigars or the mold gets into the wood of your humidor. Mold appears when the RH passes 85%.
Saving the moldy cigars is going to be tough. Wipe off the contaminated cigars (contaminated ones only! - don't spread the mold!) with a clean paper towel, slightly moistened with distilled water. Separate the contaminated cigars from the others.
Make some kind of temporary humidor for those contaminated ones. Put it in the refrigerator. (yes, it's okay - refrigeration will dry them out without a source of humidity.)