is this always like this?

i sent some XCP to poloniex. after the first confirmation the coins where sent to an other address.
this must be an other address of polo - according the amount of coins inside...
and after the second transaction  was confirmed too i still had nothing in my polo wallet - or they still did not show it.

strange.

EDIT:

now the deposit is visible at poloniex. they show me the address and the transaction of my deposit. but this address is empty if you check it with https://xchain.io/.

why do polo show this to me? the coins i deposited are no longer in this address....