My post are repeating on the second page

Hey the way i have my index coded is that it shows one full post and the rest of the post are excerpts, but when i click previous the 2nd page shows the same post from the first page, what can i do to change this.

Here is my index.php file

[please use a Pastebin to post large chunks of code, following forum etiquette]

The reason i query my post is because i made a custom featured content slide that only gets post from a certain category.

Without the post being query it only pulls post from the category on the content slide.