Assigned Players Not In Correct Positions

When playing clubs I’ve noticed none of the bits on the pitch match the positions of the formation, we never have a proper LB or RB, instead the RB is the third CB, LB is played by RM. both CDMs are CMs, CAMs are a mix of LM and CAMs. It makes it hard to defend when none of the defensive line up are correct and half aren’t even on the pitch