Images on the sidebar move to the center of page awkwardly

If you check my blog and you’ll see the bottom of the sidebar there are 4 images (norteamerica, centroamerica, sudamerica and caribe) that shows with no issue, but if you check my contact page you see that those images move to the center of the page.

I got those images on a widget and I don’t see an explanation for that issue. Can somebody help me with a hint please?

Thanks!