It seems to me like you have no (sensible) firewall filter rules. This can be very dangerous, your router (and network) is essentially open from the outside.
On the other hand you have some not-so-common more advanced settings (ovpn. queues, etc.).
It seems like it was configured by someone familiar with Ros and then “mutilated” by someone else (I cannot believe that a knowledgeable user would leave a router open like yours).
Check the advice given here:
http://forum.mikrotik.com/t/am-i-using-soho-firewall-or-not/180401/1
for some needed firewall rules settings.