Incorrect Score

[HungryShark99]

Hey, my minecraft name is HungryShark99, and some some odd reason, i have two different scores-

http://imgur.com/e8VMn

-one when i log in (227) and one when i speak (167). if there is anything possible to fix this (i did quit minecraft and come back in) it would be a great help, otherwise, its fine.

 

[nate252]

That has happend to me before. I had 830 points, died once, it said I lost 50 but when I talked it was at 630. Then when I joined a server it said I was at 830 still.

On top of that on the leaderboards either I dont understand the scoring or its messed up. Because it says my highest score is something when I know for a fact I have had a higher score than that. And my total points should be much higher?