C. VLAN FILTERING -http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1 and relationship between bridge and vlan filtering - http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1
***** Did you Turn ON VLAN filtering after configuring /ip bridge port and /ip bridge vlan settings *****
Note: MT help topics have vastly improved on this topic and can be found at:
https://help.mikrotik.com/docs/display/ … NFiltering
https://help.mikrotik.com/docs/display/ … VLAN+Table