Celestial Seasonings Sleepytime Extra Tea Bags, 20 Count (Pack of 2)

How is this tea different from the original sleepytime tea?

I am confused. Pack of 2 (does that mean 4 boxes)? one box of 20 is $3.28, so two boxes of 20 would be around $7.00. therefore, is the above order

does it contain caffeine since it has black tea and green tea?

Why is the price $2.25 for one box, yet over $9.00 for 2 boxes? Quite odd.