what was supposed to happen:
the jump stat would go up by one when i jumped off the block

What really happened:
... it didnt

Steps to reproduce:
1. create a stat.jump scoreboard
2.place a block
3.jump off that block with good timing so that you jump while your body is technically over air
4.check the jump stat and it wont change

/scoreboard objectives add Jump stat.jump Jump
/testfor @a[score_Jump_min=1]