Mobile Site Layout issue & other simple issues (I think)

Hello,

My site, http://www.tildenoticias.com is having the following problems:

-On the Mobile version- The format does not look right the part under each blog post is all narrow, I want this to just show the title, date and photo. If needed, I don’t mind the desktop version to reflect the same way.

-On my site I have categories that are linked to in navigation, The titles show like this (example below):

Archivo
Archivo de Categoría para “Nacional”

How do I get it to where it will just appear as Nacional ?

-When viewing blog posts in category sections, how do remove the numbers in the background?