The NHC uses previous fixes as the movement...for example... lets say its moving N but by 2am its moving NW....well the NHC will post up movement N at such and such miles per hour from the last statement. So another words...its the previous 3 or 6 hrs (matters on when the last statement was released) on its movement.

Charley was moving NNW from the 8am-11am (although we saw a wobble to the NE (which it was actually a turn NE) they trackulated the point from 8am-11am it was a NNW movment even though it already started a NE turn.