The TOC of the $25 off offer says"$25 off any $100 order (net of any coupons or other discounts):I think that would exclude what you are doing.
Generally the Total Defense rebates are 1 per month, and ive already done one, although I belive I need to check if its a different offer code.+ I dont have the Amex promo, otherwise would give this a shot.
they're charging Shipping & Handling. Anyway to bypass that?