I tend to buy maduro and other dark wrapper cigars. I like maduros a lot!!!

It seems that quite a few of the natural/CT shade wrapped cigars I buy tend to split as I smoke them.
Today I was smoking a CAO Gold torpedo. Half way through, the side split a little on me. Now I keep them stored in either an acrylic jar lined with cedar and a Drymistat tube, or my main humidor with an Oasis XL. My digital hygro (in the jar) says they're about 71-72% (+/-???) And my digital hygro in my humidor reads about 68-69% up top and 70% on the bottom(+/-???) Temps are in the 72-74 range.
This is one of the reasons I tend to not buy shade wrapped cigars.....suggestion???? What am I doing wrong???
Thanks!