Why do I often play teams from a higher league in Seasons mode

I like to play Seasons mode on FC25, but often after a game I look at who i've played against and see I was playing a player from a league 3 divsions higher than my league.

What is the point of having leagues if I just play random people from different divisions. Some times its a player from a lower league.

I've tried putting the player search options to restrictive but it makes no difference.

Thank you for any help you can offer.