Meantime a stranger, who looked like an amateur detective gotten up as an impossible English earl, had been watching the evening's proceedings with manifest interest, and with a contented expression in his face; and he had been privately commenting to himself. He was now soliloquising somewhat like this: 'None of the Eighteen are bidding; that is not satisfactory; I must change that - the dramatic unities require it; they must buy the sack they tried to steal; they must pay a heavy price, too--some of them are rich. And another thing, when I make a mistake in Hadleyburg nature the man that puts that error upon me is entitled to a high honorarium, and someone must pay. This poor old Richards has brought my judgment to shame; he is an honest man:--I don't understand it, but I acknowledge it. Yes, he saw my deuces--AND with a straight flush, and by rights the pot is his. And it shall be a jack-pot, too, if I can manage it. He disappointed me, but let that pass.

1) who looked like an amateur detective gotten up as an impossible English earl...如何理解gotten up的用法？语法上怎么理解？

2) when I make a mistake in Hadleyburg nature...这里的when从句为什么使用了一般现在时？为什么不使用过去时made？

when从句使用一般现在时，似乎很少见，一般用于名言警句中看到过。