Why did 112 themes just ask to be updated?

Just wondering why:

1) When I originally installed this theme pack, over 20 themes immediately said they needed to be updated.

2) Why 111 themes just indicated they needed to be updated. Were they all changed, or did you just change one and then rev the version number for all of them?

3) Why can’t the WPMU DEV Dashboard update these themes? Preferably just modifying them, instead of having to have the admin download a 36MB file, uncompress it, and then upload 55MB in theme files to the server.