Ledger Wallet Ethereum doesn't manage multiple addresses and multiple accounts. If you want to manage several accounts you need to use MyEtherWallet with your Nano S or your Blue instead of the Ledger Wallet Ethereum Chrome application following this tutorial.
Your private data will still be hold and secured inside the Secure element of your device, but the interface to manage your account will be MyEtherWallet.
If you ever use the Ledger Wallet Ethereum Chrome application to manage the wallet where you set multiple accounts, the application will only display the operations and the balance or your first address, even if the other addresses and accounts are still visible on MyEtherWallet.
To use your Ledger device with the Ledger Wallet Chrome application, make sure that the "browser support" setting is disabled (NO).
To use your Ledger device with MyEtherWallet, make sure that the "browser support" setting is enabled (YES).