Each Bite Me box contains 12 bars, so the two-box routine provides 24 planned snack occasions during the 30-day cycle. It does not provide one bar for all 30 days.
If you want a bar every day, you need at least 30 bars. An offer with three boxes contains 36 bars, leaving six after 30 daily snack occasions. Check whether that option is available and what it costs before ordering; it is not added automatically.