Hey.
Firstly, if you're using a theme from the WPORG theme repository, you should not be editing that theme's files directly. Instead you should make any changes via a child theme. Information on why using a child theme is considered best practise and how to implement them can be found here: codex.wordpress.org/Child_Themes.
Your footer has two sets of padding being applied to it via the CSS which is causing it to shift to the right. To resolve this, include the following CSS snippet:
#links-wrapper {
padding-left: 0;
}As an aside note: Great site. I'm currently trying to gain funding for a project aimed at young travellers. :)