Well read my post and yours.. You are wrong.. If you would like to look up the document that covers the seating on the MD80 and MD90 (And DC-9, 717, D9A, C-9B) etc look up A6WE type certificate revision 26 dated 12/4/2000 from the FAA/DOT website.
Further, If all MD80s are configured the same then how do AA, AS, DL, TW all fly them with the seating on both sides 3-2 and 2-3. Let's not forget Midwest Express with 2-2!
Nuff said, I think you better grow up...
Is the link you need!