new rules on illegal formation?

[optimusprime]

cup game vs. 5-3w-2 80-20 possession(had a few players playing OOP) and played a friendly vs. the following formation 64-36 possession:
DR-DC
MC-MC-ML
AMC-AML
ST-ST-ST

[Kylos]

Just watched a match a friend of mine was playing in the cup, opponent had a legal formation (4-1-3w-2) but I saw all his players except 1 striker were out of their positions, possession was 80-20...