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I should probably explain that players are not stationary objects. They move around the field. Therefore offensive midfielders help out in attack and sometimes even the defenders help out (though not too often).
'Match income' bug should be fixed in order to have the possibility to upgrade faster the facilities. From my point of view, it's really hard to 'learn' something about soccer game (position of players in field, tactics and others) when players have attributes under 40.