In the Ledger Wallet Bitcoin, you may have noticed that each time you click on "Receive" to provide your Bitcoin address to a payer, your Bitcoin address changes.
Ledger Wallet Bitcoin Chrome application manages multiple addresses on the same account as it supports Hierarchical Derministic (HD) protocol, a security and privacy feature. So each time you want to receive bitcoins, it generates a new address always pointing to your own account. Of course, each address remains active and yours, if you need to use them more than once. Each transaction will be displayed on your application.