You didn't specified which "btc_address_dump" tool that you've used, was that from 10gic's GitHub repo?

Because you must have an incorrect derived address since that tool doesn't check for the mnemonic phrase's checksum and just assumes that it's valid.
YourThen, your 17-words backup phrase specifically isn't a BIP39 seed phrase that can be used to derive your private keys and addresses.
That is for the recovery of your account credentials like what you did initially (when you got your password from it).
When you entered it to that tool, it forcefully used BIP39's algorithm to derive the displayed address, but that isn't what Blockchain(dot)com used to derive your keys.

On the other hand, dumping the private keys from your wallet.aes.json file will ensure that every private keys in the dump file are the ones contained in your wallet.

You didn't specified which "btc_address_dump" tool that you've used, was that from 10gic's GitHub repo?

Because you must have an incorrect derived address since that tool doesn't check for the mnemonic phrase's checksum and just assumes that it's valid.
Your 17-words backup phrase specifically isn't a BIP39 seed phrase that can be used to derive your private keys and addresses.
That is for the recovery of your account credentials like what you did initially (when you got your password from it).

On the other hand, dumping the private keys from your wallet.aes.json file will ensure that every private keys in the dump file are the ones contained in your wallet.