I’m not aware of the docs making any guarantees that expires are ordered either, just that at some point after the expiry time the keys will be expired.
sorry i should have explained. by ordered i meant after expiring a key its TTL will be set, which will never be a time before a previous expire. when it looks up the key, if its TTL has been reached it will not be returned (which we checked in the redis source). we weren't concerned about then the keys are actually removed