If you're new to our forums or have just been lurking without posting, here's a good place to make your first post by introducing yourself. Tell us how big a Dukes of Hazzard fan you are! But remember, there IS such a thing as TMI (too much information).
28.44kb is a very small file size for an image. The image would either be small in size, low in quality or both. This limit must've been set by MeadowMufn.
If the images are uploaded directly to HNet, then HNet hosts the images and will have to pay the additional overheads (increased bandwidth) every time those images are viewed. I'm guessing that that's the reason why the image size is so low. If you use a site like Flickr, they host your images, i.e. they provide an online storage location for them and the overheads are carried by that site (at no cost to you or HNet). All you have to do is insert a link into your post on HNet that references your image.