Maybe you can export a supout.rif and send to support@mikrotik.com ? And maybe you could be so kind as to give us here in the forum a screenshot?
THanks.
P.S. Good Morning Latvia 
Where are my MikroTik-ians ? Help is needed here. Clarity is needed!
P.S. 2 I found a little clarity here : OS 4.7 DHCP topic http://forum.mikrotik.com/t/os-4-7-dhcp/37166/1