Why? because there is no reason to have three threads about your single device…
http://forum.mikrotik.com/t/ip-address-to-the-bridge-or-to-the-vlan1-to-access-the-switch/177873/1
http://forum.mikrotik.com/t/steps-to-configure-crs326-24s-2q-rm-as-a-l3-switch-wihtout-router-on-a-stick/177876/3
https://forum.mikrotik.com/posting.php?mode=quote&p=1089647 <---- this thread