Why the time turner stinks/Hermione's homework

[HimemyaUtena at aol.com]

No: HPFGUIDX 80155

In a message dated 9/4/2003 12:53:52 PM Eastern Daylight Time, severusbook4 at yahoo.com writes:

[Sevvie]
> And to 
> answer another question, the reason an individual cannot travel back 
> in time and change a major event that already took place is. They 
> can, but at an extreme cost,  their minds would be bombarded with 
> new memories if the event was not kept linear as it was with Harry 
> and Hermione.  What I am saying is, could you imagine what would 
> happen to your brain if it was re-written to acount for the new 
> memories?  

Hmmm...I'm thinking there has to be more to it than that. The reason I'm thinking this, and I'm kinda suprised no one has brought it up is remember in POA when Hermione forgot to go to her Charms class. When Harry and Ron remind her of this she's very upset about having missed it. She doesn't simply turn the time turner back a few extra hours and attend charms. Why?

Adrianna