Snape, the unbreakable vow and an unwelcome revelation

[juleyjubes]

No: HPFGUIDX 165909

I, like many others on here, have been re-reading the books from 
number one and am currently reading the COS.  However, I skipped 
ahead this evening because I wanted to check something in HBP.

I have just re-read from the Lightning-Struck Tower and there is 
something in there that I don't think I had ever noticed before.  

I have read many posts on here and I know most of you tend to either 
be for or against Snape and I have always been one of those who has 
thought he is definitely DDM.  However, on page 549 of the UK hard 
back version of HBP I have just read,

Draco, "He hasn't been doing your orders, he promised my mother -"

Dumbledore, "Of course that is what he would tell you, Draco, but -"

I now have a feeling of dread as we know he did make a promise with 
Draco's mother!  Can Dumbledore really have got it wrong....?

I'm sure you have probably already discussed this many times so sorry 
to go over old ground.

Juley
(Hoping that in the end Snape turns out to be good and everyone lives 
happily ever after)