Okay, the site was definitely not up 2 days before the shooting.
Google is notoriously bad at indexing pages to accurately reflect the day they were posted.
Look at this date-restricted Google search for Sandy Hook. You can see tons and tons of articles about Sandy Hook "published" months before the shooting:
https://www.google.com/search?q="sandy+hook"+shooting&hl=en&safe=off&sa=X &ei=uMDtUPLKMYnyigLN_4DYDg&ved=0CCEQpwUoBg&source= lnt&tbs=cdr%3A1%2Ccd_min%3A1%2F1%2F2012%2Ccd_max%3 A12%2F12%2F2012&tbm=
One goes all the way back to Jan. 2012.
You can also do this and find articles about 9/11 before 9/11, etc. That's why it doesn't seem fishy, because for Google that's par for the course.
As far as witness testimony, it's notoriously unreliable. Our memories are awful, especially under stress. It's easy as hell for one shooter to turn into 2 when you're under attack by a crazed man armed to the teeth.
That's it? That's the evidence? If you're prepared to say that this is a huge conspiracy there needs to be some more evidence that can't be shot down with some basic research.