Table of Counter Formations - What to use?

[thijs88]

This guy, has this (illegal?) formation:

DL-DC-DC-DR
DMC
MC
AML-AMR
ST-ST

How is it possible that he keeps having 50% ball posession, its an illegal formation, and he won 4 times in a row, fifth time he lost though. All of his games he has 50% or more ball posession and the opponents formations are not illegal. How is this possible? He didnt made any substitutions by the way, nor the opponent. And also of the same level.