404 Error in Admin Panel

Hey I’m having a problem on the admin panel for my blog. Whenever I try to go to the 2nd page of something (for example Posts or uploaded media), it always gives me a 404 error. I’ve identified the problem but don’t know how to fix it. I’ll illustrate it better below:

Here’s the URL for page 1 of my Media library:
http://www.expatfinancialadvicespain.com/blog/wp-admin/upload.php

But when I click to go to Page 2 I get the 404 error… the URL looks like this:
http://www.expatfinancialadvicespain.com/cms5/blog/wp-admin/upload.php?paged=2

When I remove the /cms5 from the previous link, it works and I can see Page 2. How do I get that /cms5 part removed from the links? Any help would be greatly appreciated. Please and thank you!