In the default configuration, all ports of the bridge, including the virtual one that connects the functional block “bridge” to the functional block “router”, are configured as access ports to VLAN 1. Hence you do not need to create any interface for VLAN 1 - the frames belonging to VLAN 1 are available without a tag at the router interface named “bridge”. Attach the IP configuration directly to the “bridge” interface. This is similar to e.g. a Cisco router with a plug-in switch card.
Please do read the first link that @mkx has suggested - http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1 .
And once again, please consider a voice call, as it might speed things up for you a bit: http://forum.mikrotik.com/t/bobcat-miner-300-relayed/154400/65