Suggestions About My Tactic

Hello friends. I'm just level 2 in top11 and trying to learn something about game.
My recent tactic is

- - ST---ST
----- AMC
ML -- MC -- MR

DL DC - DC DR

I think it is 4-3-1-2 but game says 3-4-3 that is first thing that i dont understand.
I have the strongest team in my recent league thats why i cant understand how is my tactic useable or not.
I'm changing my advance tactics for all matchs against my opponents power and tactics.
How can i improve my gameplay and tactics i need your helps.

Thanks :)

Where does the game say it's 3-4-3? If your team is the strongest, then what's the problem?

Beacuse next levels will be harder and i wanna win the cup this season :)

Use this = mentality : Attack (defend if is much stronger team ) / focus : down both flanks / press : own half /tackling style : normal (hard to a much stronger team) / Passing : normal ( longs to a harder team ) / Marking : zonal always ! and you can try Force counter attack too !