wendysahl on "Twenty Twelve Images Outside Article Border"

I'd like to apologize in advance, I posted this earlier on the themes and templates part of the forum but haven't received any answers. I'm not an expert but I feel like this origin of this problem may be in one of the .php files...basically, with a child theme, I am using Twenty Twelve. I have added a border around the article post content. Any images added as part of the content fall over the border and extend beyond it as if they are not loading as part of the post itself. If the text of the post is long enough to wrap around a left aligned small image then the border, since it does go around all of the text, also includes the image. I've tried placing text below the image in both the visual and text editor (with several
after the image in the text editor) and the post text still loads along side the image rather than beneath it. I know this isn't the forum to be walked through little things but if you could let me know if this is a known problem with a fix I would appreciate that. Thanks! **The site is for someone else and under construction so I am unable to provide a link to it. I've never had any trouble in Twenty Twelve before but I normally work with much larger images and no borders. Thank you.