If you want to flash your device fully you shouldn't be specifying any other parameters for flashing apart from flashing the fiasco and maybe reboot after successful flash.

Your contacts and calendar information are stored in a different partition where the fiasco image does not flash.

There are two ways to completely wipe everything on the phone and get it back to factory settings:

1) unverified: Settings> Clear Device (look for blue arrow pointing downwards from the word Settings near the top of the screen).

2) flash both fiasco and eMMC (eMMC image needs to be downloaded separately) using the methods prescribed in the wiki for flashing the device.