Snape once again puts 2 & 2 together & comes up with wrong answer

[vmonte]

No: HPFGUIDX 100833

Susan wrote:
If Snape was going to do anything even remotely redemptive in
Harry's_ eyes, Snape's motivation for doing such would have nothing
to do with actual redemption. It would concern his own reasons for
either hating LV or sucking up to DD or getting recognition from the
MoM, etc. The Slytherine Way.

The only thing that bothers me about this is that it goes back to the
pure speculation that LV did something *personally* to Snape, which
seems to inevitably bring us back to him having a family or love life
and of course, the twins;-), which I just cannot picture. I totally
agree that there obviously has to be some kind of motivation for
Snape to stop being a DE, and I can't wait to find out what that is...

vmonte responds:

I keep thinking about how JKR likes to trick us with mistaken
identity. Harry sees himself at the lake in PoA but he misunderstands
what he sees. He thinks he sees his father. We've had fake Moody,
Harry as James, Harry and Ron as Crab and Goyle, etc. She will
probably do this again. James and Lily are both dead--there's no
doubt about this. Their echos both come out of Voldemort's wand. If
Harry goes back in time things are not going to work out the way he
wants them to. Hermione's comments about wizards killing their future
and past selves may come true--and I'm not just talking about Harry.
What if other people follow Harry to GH. Also, we already have a
shape shifter (Tonks) in the series. What if she is evil (or what if
there is another as yet unknown DE metamorph). They could go back in
time and mislead Harry by morphing into someone he loves or by
morphing into 18 year old Harry and really mess things up...

Also, I've been thinking about Sirius remark to Snape in the 
Shreiking Shack. Something about: 'As usual Snape, you've put two
and two together and have come up with the wrong answer.'
What if Snape had to make sure that Harry lived up until the point he
goes back in time to GH.
What if 45 year old Snape followed Harry back. And what if Snape
needs to go back to correct a mistake that happened that night. He
may not have access to time-travel until Harry goes back.

What if Snape put two and two together that night and accidently
killed his future self (or made some other huge mistake). You know
the explosion at GH really does seem like someone was trying to cover
up something. Did they find body parts there? Could the hand of Glory
be belong to someone that was at GH?