Blog Page 2 Issues and Scorecard Research

Just a few issues:
The blog page shows pagination at the bottom; when you click,  it goes to page/2 but only repeats the same blogs as the first page. Further, it only ever shows an option for page 2, never 3, 4 or 5 and upwards etc.
I have the number of posts to display set to 5 in theme barrack and I have 85 posts. I have added all of them to the ‘blog’ category so I don’t know what else to do?

I recently ran a speed test on the site and the speed results with your theme were slowed by:
b.scorecardresearch.com,
w.sharethis.com/button/css/buttons,
edge.sharethis.com/share5x/index,
seg.sharethis.com/getSegment.,
l.sharethis.com/pview?event

I haven’t seen these in the previous test using a different theme. Are these essential and can they be removed?
Regards