i sent some BTC form open ledger to Bitmex and looks like i received less

[abit]

Due to gateway fees set by gateway operators.

[orzobimbo]

Hallo everybody

today i sent some BTC form open ledger to Bitmex and looks like i received less then what i sent.

   
chebordello77 sent 0.01148339 open.BTC to openledger-dex

Feb 20, 2018, 11:39:21 AM   Deposit   0,00898339 XBT   -.--      Completed   0,0089 XBT

now, the difference is 0.01148339-0.00898339= 0.0025

Not too much, but i wuld like to understand how it work as seen i tought to have payd the commission already in BTS.

thanks in advance