Hi guys! I'm new to Umbraco and now I'm learning about all its features by manipulating the Fanoe starter kit. I've noticed that when I add a new grid layout to a certain page, if I don't change the background color it has one size, and then when I change it the grid gets a bigger size when previewing the website. Also, I created a grid with images and hover effects, and when I changed the background color the images get smaller and the grid itself gets bigger. Is this a bug? Or is it something I can do about it?

Thanks!