Why are you using VLAN1 for anything… On MT its the default working in the background and typically is not used to carry data.
Suggest that if you want management vlans and data vlans coming into the MT, none of them use vlan1.
VLAN1 is the native/default vlan set on most managed devices.
Typically they are members of but untagged on all trunk ports (those carrying vlans tagged)
Typically they are not members and are replaced by the pVID of Vlans heading to dumb devices { same with hybrid ports }
Check out these references.
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
https://help.mikrotik.com/docs/display/ROS/Bridge+VLAN+Table