Scrolling pages doesn't work well

Hi
I have configured Nickel Layout theme for my blog.

I have 2 kinds of issues scrolling pages:

1. List of all posts: if I go on page 3 it appears a blank page. If I click on pages 1,2 and 4 it works
2. List of posts in a specific category; if I go on page 2 the layout of page is weird . The other pages are ok. It happens only in a specific category (you can see the enclosed pdf)

I don't know if 2 issues are related.

Please note I cannot provide you an admin access as I'm working in a local computer