speed glitch???? cant break a block? what?!

ok so i was playing with my friend and way back when i first got minecraft in 1.3.2 i got in and i was going like 40 blocks a second and i couldnt break a block i had to hit it almost 7 times! and from 1.3.2 it till comes to where i cant fly/break/move correctly i dont know if my charactr i curropted or i installed minecraft wrong i dont know what is up can omeone help PLEASE?