Some questions about Time Machine
Some versions of files are stored temporarily locally, when you're away from the TimeCapsule. These are on your MacBook and can therefor be accessed without the TimeCapsule present. As soon as the Mac syncs back with the TimeCapsule, they are longer stored on your local drive, therefor you'll need a connection to the TimeCapsule to restore them.
"Mobile Backups" in the Library
It won't keep so much files forever, as it deletes some after a time. Hourly versions are only kept for a week I believe. From then on it's daily versions.