definitely do! i noticed it easily because in 2 days i wagered over 2 btc and only got 2.5 levels and based on your calculation i would have gotten 6. it made it pretty easy to tell something was off. make sure you turn off any auto bets before you do the test so you have spot pricing, exact calculations on your xp gain, etc :)
Yeps will do :)) gonna check it but as I said @stan: will really be able to explain it so will notify him to take a look when he's on :))