/interface detect-internet
set detect-interface-list=all
Rule #5:
http://forum.mikrotik.com/t/the-twelve-rules-of-mikrotik-club/182164/1
A couple related threads:
http://forum.mikrotik.com/t/does-detect-internet-actually-do-anything/143971/1
http://forum.mikrotik.com/t/does-detect-internet-actually-do-anything/143971/1
/interface bridge
add dhcp-snooping=yes name=Loopback port-cost-mode=short
Rule #6:
http://forum.mikrotik.com/t/the-twelve-rules-of-mikrotik-club/182164/1
Related thread:
http://forum.mikrotik.com/t/bridge-auto-mac-issue/162131/1
(but yours is seemingly empty, so not a problem, though maybe a bridge with no interfaces in it is unneeded)
Mind you, those settings (or non-settings) are not “wrong” in an absolute sense, but they are re-known to potentially become a source of issues.