Blog Masonry

Hi,
I installed the blog plugin and activated the Masonry style (I’m also using Hooks, Page Header, Sections) and I’ve noticed two issues:
– on the iphone6 the blog width is larger than the phone screen, indeed I can scroll the page towards right.
– on the laptop, (I tried both safari and chrome) when I click on +More in order to recall older posts, the height of the Blog Page Header increases twice than normal.

I like the theme very much but there are few annoying issues.
I hope you guys can help me, I have to deliver the project by Monday morning but I didn’t expect to face these problems.

Take care
ES