Hi, take a look on my home page http://www.pojezierze.org – there is a problem with the position of posts (free space between articles). It doesn’t look like on demo version and I don’t know how to change it.
Thanks for help,
MG
Looks like you have full posts set to 0 so it’s only displaying the grid view.
Appearance > Theme options
In the general tab scroll down to the header Home page and set the full posts to display to 3 to replicate the demo layout.
Unless it’s what @scarletl said, I don’t see any issues with your posts alignment.