I want to change my font size for the header because when it is shown on a phone the title goes through the logo

my website shows blog posts in two different ways at once with the Cream Blog theme. I only want one way for the posts to be displayed – as below, with the samller images on the left. I want to know how to disable the other way – as aobe with the text in the larger images. This problem only occurs when I add a featured image to a blog post. I want to use featured images.

I would appreciate any help.

When I click on the author name in a post, it doesn’t take me to the posts by the author like in demo but redirects to the homepage. Please help.