The background is the comments you see explain the “why” it was dynamically added. Since they were added for different reasons, there are multiple dynamic entries.
In this scheme, you can already have a static and dynamic (so a “duplicate”) for same VLAN in /interface/bridge/vlans. So I’m not sure it’s terrible there are multiple dynamic VLANs shows.
The whole topic of the bridged vlans starts confusing… So whether multiple dynamic entires with comments is “easier” than just one dynamic entire lumping everything together is a pick-your-poison sitution.
If wrote script/tool that “visualizes” the bridge configuration here:
http://forum.mikrotik.com/t/example-of-automating-vlan-creation-removal-inspecting-using-mkvlan-friends/181480/1
Since the presentation is tough to read even with just one dynamic and one static configured…