YOur config is not correct yet.
Read through… http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
First decide if you need vlans.
If you have enough ports that you dont need vlans.
Keep the bridge and ditch the vlans and put subnet iot on etherX and subnet dorsx on another ethport.
OR
All vlans
meaning take the subnet off the responsibilty of hte bridge and create a third vlan, with interface bridge like the other vlans.