Website Builder Image Galleries - heads are getting cropped off on different monitors. Help.

When viewing the website I created in Website Builder, the images in my image galleries appear different on different monitors.  The people's heads are getting cropped in half on some of them.  This didn't happen with my images when using Sitebuilder.  The images also look pixelated on some monitors but not on others.  What is going on and how do I fix it?  brody2.homesteadcloud.com