What is your humidity reading in your humi????
Is it a recent delivery??? If so, they may not have stabalized to your humidors conditions yet. Many cigars are shipped wet, so they do not dry out during shipping. If they were shipped at say 72%, and you put them in a humidor at 65%, then the wrapper would dry faster than the filler leaves do. Until lighting this is OK, but if you light it, the moist inner leaves will expand, as the heat hits them but the dryer wrapper, is contracted due to drying conditions, and the cigar will explode.
just my .02
Dave (A.K.A. Homebrew)