When a domain expires, the registry automatically bills the registrar for the renewal of that domain. This allows the registrar to retain the domain in case it was an unintentional expiration. This also allows the previous owner to have time to renew the domain during the expiration grace period.
Even though there is a future date on the domain, the name is still expired, because the registrar hasn't yet received payment for the domain. Technically, the previous registrant is no longer the owner; the domain becomes inactive, the website is replaced with a parking page, and all services are disabled (such as email).
Once the domain is renewed, it will be added back to the active list of domains in the account, and it will no longer show as expired.