Business Services Theme - News Image to not zoom

Hello, On the news section of the home page (right column), My images keep getting zoomed in.. even when i create a small image. But maybe Im inserting the image wrong. Ok, in my post, How would I go about adding an image so that it will show up on the home page? My post actually usually have large images like 350 - 500 px width. But I also created a dupe of the image and made it real small. I try to add it to the post under custom field, but on the home page it still displays the giant image (and therefore zoomed in). Ive always had a problem with this even on other themes, so maybe i just dont get the custom field part?