The Version Tree will show every version of the configuration in the archive for a given device. Even if you are running Sync Archive jobs weekly, it could be that syslog messages, periodic polling, or system collection are archiving the config daily (even for your access switches). If you are doing custom collection via Sync Archive, you will want to make sure your periodic polling and system collection jobs (under RME > Admin > Config Mgmt > Collection Settings) are disabled.
Syslog is a different story. If you are sending syslog messages to the RME server, then RME will attempt to archive the config from the device immediately upon receiving a config change message. If changes occur daily, then you could conceivably get new archive versions daily.
As for restoring the config to the device, Version Tree is as good of a way of doing this as any. Just select the config version/date you want to restore, and open it. At the bottom, there will be a Deploy button. If the device in question is a new replacement for a failed device, select the Merge option. Else, leave the option as the default Overwrite.