A Mikrotik bridge has two roles, one is like a switch connecting a number of interface ports together and the other like an interface port connecting traffic between the switch and serives running on the CPU, see http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1 for an in-depth explanation.
Generally on a Mikrotik which is being used as a switch you do not require multiple /interface vlan entries, typically you would have one for remote management access to the Mikrotik, they are not required for VLANs which are being switched between the external interface ports.
As ever, post the output of /export hide-sensitive from a terminal window in a code block (the icon above the message box when posting).