: I got a message from XBL saying that I had purchased the Warzone REQ bundle
: twice even though its supposed to be a one time thing... I definitely
: bought the DLC code for the Warzone REQ bundle from gamestop when the game
: first came out but I don't remember buying it elsewhere (Unless it came
: with the legendary edition too?)

: anyway I booted up Halo 5 and there were 14 Warzone REQs (Each with 3
: Permanents)... I got so many Legendary items and certifications (Fred's
: Armor, ONI Scorpion, ONI Matis, ONI Gauss etc...)

: Wow! I mean I'll take it I guess XD

Turns out this is an intentional thing by 343. Anyone who used a Warzone Bundle code after buying a prievious Bundle are received both. https://www.reddit.com/r/halo/comments/4bnipu/people_who_had_a_warzone_bundle_with_their_game/

"3.23.2016 Update
Warzone REQ Bundle Duplicate Purchase
We have identified several fans who have attempted to redeem token codes for the Warzone REQ Bundle after the offer was already purchased on their account. These codes could have been acquired through either promotional bundles or purchase at retail. While this is a small number of fans, we want to honor their purchase and commitment to Halo 5: Guardians. We are doing a one-time-only distribution of 14 Warzone Premium Packs to any players who have purchased the Warzone REQ Bundle and then subsequently redeemed a code for another bundle between the dates of October 27 and January 25. Those who have been affected by this are being notified via an Xbox Live system message. This will happen once only; any token codes applied to an account that previously purchased the Warzone REQ Bundle after January 25 will be lost.
Thank you for your patience!"