Okay i just found some glitchs.

When i withdraw multiple csgo keys, ( with different kind. like pheonix and chroma ) system sends me offer with only 1 key.
whatever i selected and how many i choosed
withdrawing works with same keys. ( so like 5x pheonix keys works )

I am unable to submit good proof screenshot since it seems it does not allow to me to find key exchange log so im submitting the trade offer screenshot instead

http://i.imgur.com/cAfsDHL.jpg
in this screenshot, i choosed 1 phoenix, 1 breakout , 1 chroma 2. but bot sent me just chroma 2 key.

This is the Unique code of the offer.
[3a3e65769458c3835775767c030f04c2c9be376c / 1443688806] Security code: 808932 - Key credit withdrawal (?)

I also got same situation with this offer.
[33dd95e4c66918c7bdaa84c3e7915dcfffd9bf78 / 1443686174] Security code: 808932 - Key credit withdrawal (?)

So i lost like 4 csgo keys.

Joto, can you check this issue for me? thanks.