Yep, that did it. Thanks!
I was using the Latest Posts plugin. It’s pretty useful. I’ve changed though and now I’ve been generating my own custom posts pages using custom PHP, because it allows me to do more things.
I’m seeing this same issue with the posts page on ipad and iphone. The posts are still organized in three columns, which makes the posts significantly wider than the header and footer.
For now, I’ve been avoiding using the recent posts page altogether and I’ve started using a plugin to display posts by category.
Website is turkishtextbook.com