Hi,
before diving into deep math, check your message hashes. Those are definitely wrong.
Well that is the point of this topic, according to the math having the same same R and S is only possible if the hash is the same for all the message as long they belong to the same publickey.
I already checked the Signaures and all of them has the same R and S But the values of each those utxo are different. This only should mean that such Transaction is invalid.
I think this is bitcoin mixer transaction, and maybe sach transactions will more