Re: There are 2 character cards showing "4","0","1" broker..
You mean the card that lets you use brokers first used to bid for turn order as brokers in play, replaced by brokers from your pool?
In that case: No. You can use any one or both brokers from in front of your screen (those you used to bid for turn order) and place them on the board as usual (one face up, one face down). Replace the used brokers by brokers from behind your screen (your pool).