This is de-facto guide to how to VLAN on ROS: http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
And, while at it, you might want to wrap your head around bridge and its multiple personality issues: http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1
In ROS it’s similar … as long as you don’t use bridge to join physical ports on L2 layer. If you do use bridge (and I see you do), then you have to configure VLANs on L2 (2 places: bridge/ports and bridge/vlan) … and then create L3 VLAN interface (in /interfaces/vlan) anchored to bridge interface.
Both are covered in the tutorials linked above (collectively).