Not sure Normis, I know in another thread that is exactly what I recommended to the OP. ( The op had manipulated the mac address on ether1 which clouded the issue ).
http://forum.mikrotik.com/t/hex-refresh-download-speed/182770/19
http://forum.mikrotik.com/t/hex-refresh-download-speed/182770/19
and
http://forum.mikrotik.com/t/internet-speed/182962/1