It sounds like you're starting from a Finder window showing something that wasn't backed-up on any of those backups.
Try either selecting your Computer or internal HD in the sidebar before going into Time Machine, or pressing Shift+Cmd+C after getting there.
You might want to take a look at Time Machine - Frequently Asked Question #15A, especially the pink box there.
If that doesn't help, post back with a bit of detail; are you still on Lion (10.7.x), what sort of Mac do you have, where are your backups (external HD, Time Capsule, Network Drive, etc.)? It might help to post a screenshot, too.