Blockchain.info, does recovery phrase recover all wallets? I need some help understanding blockchain.info.

1.

Under the Default wallet, I can generate multiple addresses and also see the Extended Public Key (xPub). If I go to the iancoleman BIP39 mnemonic converter, and input my backup phrase, it shows all the addressed I generated in the default wallet, and also shows my Extended Public Key (xPub).

But:

If I add a new wallet by clicking "Add", and create addresses under it, I do not see these addresses on the bip39 page:
https://i.imgur.com/0LZcxWq.png 
This wallet also has a different xPub that is not on the bip39 page:
https://i.imgur.com/WDlXZHz.png

Can someone please explain this?

2.

The wallet recovery backup phrase, does it only backup the default wallet (and all addresses in it)? Or does it backup all wallets within blockchain.info ? (I am talking about wallets created using the "Add" button, NOT another account with a different email).

The reason I'm confused, as I stated above, if I input the recovery phrase in the BIP page, it only shows the xPub and addresses associated with the default wallet only.

If someone help please?

Thank you!
Blockchain.info follows the BIP 44 standard for derivation paths, so the default account has a derivation path of m/44'/0'/0'/0. The derivation path for each account follows the format of m/44'/0'/i'/0. So for each account, increment i to get the address for it. On https://iancoleman.github.io/bip39/, when you scroll down, click the BIP 44 tab and increment the number in the "Account" box to get the next account you made.