Snape, Voldemort, and teaching (was: Question..)

[Julia]

No: HPFGUIDX 135374

> HunterGreen:

> In OotP, Snape told Umbridge he had been teaching at Hogwarts for 
14 
> years, which would be since Harry was about one. If he started at 
the 
> beginning of the term, that would have been about two months 
before 
> Voldemort's fall. Voldemort, at that point, would have been 
plotting 
> and planning a long time about the prophecy (since it was made 
over a 
> year before), and would have been planning which boy to murder (if 
it 
> was, as Dumbledore says, a choice, rather than going for the boy 
he 
> could find), if Snape got cold feet about that, than right then 
would 
> have made sense for him to want to switch sides. EXCEPT, according 
to 
> Snape (and he implies that this is easy-to-confirm knowledge among 
> DEs), he went there on *Voldemort's* orders, not by his own 
decision. 

Julia here:
It's really strange - that Snape's case. According to him in OotP he 
started working 14 years ago (which can be after Potters death!) BUT 
in HBP he says to Bellatrix: 'I had sixteen years of information on 
Dumbledore to give him when he returned'. How can this be? In HBP he 
is refering to him staying in Hogwart so unless he helped Hagrid, 
Filtch or cook with other hause elves he had to teach! When is he 
saying the true? I am under the impression that he isnt honest with 
Bellatrix but then, shouldnt Bellatrix at least knew when he became 
a spy at Hogwarts??
It's really confusing, someone has an idea??

Julia