You've earned the Leviathan Harpooning - Level 6 achievement!

Except I've only completed level 2! I took a screen shot too if it helps. I got this from beating level 2 of the Leviathan Harpooning game. When I'm on the 'Start Level 3' page it gave me that achievement. I'd rather earn this on level 6...c: Unless it's suppose to say for beating level 2. Regardless, I thought it'd report it.