It’s a bit odd, different behaviour. You might even want to consider using the 7.18beta release for testing purposes.
Also, on your CAPsMAN VLAN filtering is missing on the bridge. If you want to know more about VLAN and MikroTik, have a look at this topic:
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1