[still bugged]EDH still buggish after February patch

the EDH mode contains the following bugs:
1 - whenever a commander/general is exiled from the game, each player plays it back without any penalty to its casting cost, while it should cost 2 more colorless mana for each time it has been exiled.
2 - the EDH mulligan is working weird. Now, when the player has the chance to mulligan, he now exiles each chard that he dislikes rather than re-shuffling the unwanted cards in the deck. Right before the patch, instead, it was possible to shuffle in the library the unwanted cards with a ratio 1:1 for the first time; 2:1 for the second time (re-shuffle 2 cards to get a new one) and so on.
1 - whenever a commander/general is exiled from the game, each player plays it back without any penalty to its casting cost, while it should cost 2 more colorless mana for each time it has been exiled.
2 - the EDH mulligan is working weird. Now, when the player has the chance to mulligan, he now exiles each chard that he dislikes rather than re-shuffling the unwanted cards in the deck. Right before the patch, instead, it was possible to shuffle in the library the unwanted cards with a ratio 1:1 for the first time; 2:1 for the second time (re-shuffle 2 cards to get a new one) and so on.