Haven't returned to EMC for a while so I decided to post this: It's absolutely normal because the gift code is reversed. To redeem the game you must type the gift code (random strings of text after ?gift=) into your address bar from RIGHT to LEFT , then try again.
1 copy left! Here here's a bonus for all of you guys (I'll play the DRM-free version anyway): https://www.humblebundle.com/gift?key= sTN5uw aypHN3h vq8 (Remove spaces) Edit: All gone
Well, it's still slower than I thought, if I put these keys on reddit or MCForums they would be all gone within minutes(Or even seconds if a bot grab them before humans do).