One thing people need to understand is that no two judges see the same fight - they are spread around the octagon.
That being said, it's pretty rare when 2 judges score it 5-0 and a 3rd judge gives the zero 3 rounds. I could see 2 rounds, but judge #3 is saying Felder won the fight.
One thing I get though is not giving a round to a guy just because he lays on his opponent. I didn't see the fight, some say RDA did nothing on top. Others say he had control and that is enough.
Is it control when Damian Maia wants you in his guard?