When you use the redeem button, you redeem all unlocked tier, not just some of them, you can redeem a higher tiers without the lower one.
Check your purchase to see exactly what are the reward you redeemed (http://lastchaos.aeriagames.com/itemmall/cart/purchase-history). If you still have something missing, use the contact us form.
Also be sure to redeem in the appropriate tiered, we have a new one today, use the tab to select the right one (Yesterdays it was the "WOW" tiered)