C&D is committed to providing as natural a tobacco as possible, which translates to adding as small an amount of mold inhibitor as possible. As has been stated earlier in this thread, their mold issues have for the most part centered around their red Virginias. After their disastrous 2016 release of their small batch Carolina Red Flake, where the entire shipment got recalled because of widespread mold contamination, they've attempted to adjust the level of mold inhibitors. Reports of mold issues have declined since then, though not gone away. Their mold issues also seem to be related to specific blends as well. And other brands also experience mold, though not as prominently as C&D.
My issues with C&D had to do with tin rot, something that occurred with several Pease blends. Failure rates on those old tins of troubled Pease blends like Haddo's, Bohemian Scandal, Renaissance, Cairo, and one or two others reported to me, was close to 50%. I opened up and jarred tins dated as late as 2011 and found corrosion forming at the solder joints. So while I interrupted the aging process (oh boo hoo) I secured the tobacco from becoming spoiled.
I love some of the Pease blends and C&D makes a couple of my favorite blends, Bijou and Yorktown. Otherwise, I don't cellar C&D because I don't like their blends. I'm 90% a Virginia and VaPer Smoker and I don't find Virginias to be C&D's strength. My cellar has more Samuel Gawith, HU, K&K, McClelland, Germain's, MacBaren, RO Series, etc. What I do cellar of C&D is jarred since I don't trust their tins for the long haul.