Yeah, it's pretty confusing that they labeled Spanish cedar as such, somone a long time ago, jsut thouhgt that it had a cedary smell, and named it thusly. but yeah, only spanish cedar for shelves, and definatly only the kiln-dried if it's gonna touch your sticks (the non-kiln-dried [or under-kiln-dried] can sometimes "weep" sap, and get all sticky.) I'd assume that if you're putting a box or something on the shelf, then any spanish cedar'd be ok (i'd still only reccomend the kiln-dried). ggeise probably has the best idea, just waltz down to your local cigar shoppe, and ask if you can have any extra boxes, or if you can't find them, then various online shoppes usually sell empty boxes in like 10-packs for fairly cheap, and if they say "no", i think you'll see an occasional empty box on cigarbid.com (or eBay for that matter).

As for your hygro's, the chances are that they're both off in different directions, do the salt test to find out, your analog may just need adjustment.