Image spacing different on pages v. posts

Hey everyone, here’s an issue I hope someone can help me with. I have gone and edited the default stylesheet via the Editor to tighten the spacing around pictures and their captions. This works well with posts now (http://dontworrymom.com/the-summer-side-of-life/) but is causing the photos in pages to drop (http://dontworrymom.com/about). If I fix the latter, photos in the former rise. Help?