The Prophecy - Did Snape really only hear half of it?

[rummage8]

No: HPFGUIDX 171369

So forgive me if this has already been thoroughly discussed. There are
so many posts that there is no way that I could go through them all to
see if this subject has been touched upon.

Though, I am pretty sure that most of the people in this discussion
group are die hard fans, so I'm sure this has been discussed...

That being said.

The prophecy:

I am a little confused about Snape only hearing half of it. And I
would love any feed back anyone has.

Dumbledore tells Harry "that the eavesdropper was detected only a
short way into the prophecy and thrown from the building...He only
heard the first part, the part foretelling the birth of a boy in July
to parents who had thrice defied Voldemort. Consequently, he could not
warn his master that to attack you would be to risk transferring power
to you--again marking you as his equal."

This is fine. So from this picture. Snape is hovering outside the
door. Listening in. He hears "THE ONE WITH THE POWER TO VANQUISH THE
DARK LORD APPROACHES...BORN TO THOSE WHO HAVE THRICE DEFIED HIM, BORN
AS THE SEVENTH MONTH DIES."  He is caught. The owner tells him to
scram. He runs and tells his master what he has heard.

Ok, but this is does not make sense.

In the 6th book, when Trelawney gets manhandled out of the Room of
Requirement, she tells Harry about her first meeting with Dumbledore.
She says to him " Dumbledore did me the courtesy of calling upon me in
my room. He questioned me...I must confess that at first, I thought he
seemed ill-disposed toward Divination...and I remember I was starting
to feel a little odd. I had not eaten much that day..but then...but
then we were rudely interrupted by Severus Snape!..Yes there was a
commotion outside the door and it flew open and there was that rather
uncouth barman standing with Snape, who was waffling about having come
the wrong way up the stairs, although I'm afraid that I myself rather
thought that he had been apprehended eavesdropping on my interview
with Dumbledore..."

So we have already seen in the third book..crap at least I think it's
the third..perhaps it's the fourth..where Trelawney makes that little
prophecy to Harry..and she goes all trance like...
she is all trance like..and not aware of whats going on..
so for her to have known it was Snape..that means that she would have
had to finished the prophecy..she would have had to come out of the
trance to see that it was Snape...
which means that Snape would have heard the whole thing

so ok...few things have come to mind..maybe jk made a mistake..its
happened before
or
maybe Snape only told Voldemort half the prophecy...

so if he heard the whole thing...it could totally be read as his
downfall would be that night...the night Voldemort goes to kill him..
I mean there is nothing in there about it happening 17 years later?
if you heard it..you would assume...the dark lord will fall when he
tries to kill him, except Snape doesn't know how its going to end...he
doesnt know how Lily is going to go all lovey on Harry.

Now... I am assuming that he is assuming that it would be his
downfall...keeping in mind..this is kind where Lily comes into play.
We can't assume at this point that Snape knows how the dark lord will
interpret this prophecy..at this point it could have been either the
Potters or the Longbottom's. In fact, apparently Snape (if we cant
trust what he tells Dumbledore), is distressed when he finds out how
the Dark lord interprets the prophecy. Which only means that he
[snape] had interpreted it as the Neville being the one chosen one.
Which also makes sense...he despises james..he probably wouldnt have
allowed it to enter into his mind that James' son could have been of
any importance

WHICH..now that I am thinking about it..adds to why Snape would be
distressed to think that the dark lord interprets that prophecy to
mean Harry..I mean...not because of his love for Lily..but his hatred
for James.

So yea..i just wanted some feedback..that would be awesome.

rummage8