If you have any friends club that are the same level as you on the same server, then this takes priority on forming leagues than anything else, chances are you have been put in a league of 13 russian friends and your there to make the league 14 teams. Champions League is also similar, If you have any friend clubs again the game will try and put you in the same CL competition and sometimes even in the same group. If you don't have any friends then your draws are more or less random for you.