Aug. 7, 2015, 11:29 a.m.
I checked the Steam inventory history and the record in the database since 3 Aug and they match each others. Which means there were no calculation mistakes on key withdrawal.
My guess is that the system probably has adjusted itself after and correct your credit. After all looking at the net transaction and total withdraw the number adds up as well.
Maybe you can look for discrepancies between your Steam inventory history and you key credit withdrawal history (i.e. a transaction shows up in your key credit history on this site but at that time you were not withdrawing keys).
Hello again , i just checked key kredit withdrawal from shop with trade history of my account and numbers indeed do match. So i somehow managed to withdraw more then i actualy had. My initial calculations were wrong and i apologise for that and for wasting your time.
Please take a look at this bug, becouse i actualy withdrew more then i had in key credit.