Well it seems to me, if I understood your post correctly, that you will fly out as silver by right. If you are issued BP all the way to Asia from Europe will probably be silver all the way. If you need to get your BP on arrival then my guess would be depends on if they consider it to be one booking ( then you might get lucky) or, which is not unusual, the computer system doesn't update your status until the next working day. That would be my 10c worth anyway!