@adventuregrl: You must ask those people if the distorted images they're seeing start and end where the text column starts and ends or if they run past it. In the first case shimworld's reply applies, in the second it probably doesn't (second case smells like Explorer).
Two pieces of advice:
a) There's no point uploading 300dpi images when browsers display them at 72, and 2300px wide images when your theme displays them at a maximum of 531px. Ideally you should downsize copies of your images (using an image editing application or an online tool) to a resolution of 72 and a width not exceeding the maximum for the theme you're using, and upload and insert those copies. This way you save storage space, your pages load faster, you get no issues with Explorer, and you get better quality on the post as well (because images downsized by WP lose some color and sharpness).
b) Your main page takes too long to load because you've got many images (and the images are unnecessarily large files, as I explained). You should set the number of posts per page to only a few (in Settings>Reading) and/or use the read-more tag to truncate the posts.