Are you sure you did not send 1200 ? If you are looking at the tx afterwards and see 1600 leave, it's because you have to send whole outputs, and 400 would come back as change (well, a bit less, due to the fee).
Send XMR to the transaction website has not received, please[...]
Yesterday, I gave 1600 XMR to the www.poloniex.com trading site, 400 have not received, received only 1200, I query block is only 1200. 400 do not know where to go, I am today from the new update of the wallet, also can not find the lost 400, I should be how to do, please answer me, thank you very much.
MY ID c6a2a4e0d5b42f8fe9b055e1ad6308e2d864acdcf460a09e31722768a9e4c6d4
MY MaiL [email protected]