I'm afraid that your I-485 will be returned too - 回複:7月2號到NSC的被T
Since your I-765 was returned due to signature absence, and you filed I-485/131/765 in one payment, your other petitions will be returned due to incorrect fees.
As I-765 fee increased on 7/30, the new fee is $340.
Sorry to say but there seems nothing you can do about it.