That is why I asked a straight, simple question about providing a sample, because I know people are trying to help me and I want to be accommodating. Regarding your questions, I am uploading pictures directly from my home computer, so I can't well provide a link (unless you have a suggestion for doing so . . . I do not have experience with services such as flickr and photobucket). The uploading process I used was simply using the updated upload function during the writing process for the blog entry. I browsed for the picture, added a title, and uploaded it. After uploading, it shows me a small version of the picture (not sure whether it is actually a thumbnail or not) and gives me the three "Link To:" options, but neither the word "Show:" nor either of the "Show:" options, "Thumbnail" or "Full size". I can send the photo to the editor, but without the "Show:" options my only option seems to be to put the entire picture into the blog, which is too big.
I have tried uploading both from home and from work using the same process with no luck.
I hope this does not come back to backfire on me, but here is the link to the page along with a temporary password to that post only:
The first picture is one that worked normally. The second, which looks like a broken link but you can click on for the full size picture, has a manually-entered thumbnail link that is what a thumbnail link would have been named had wordpress created one (according to another thread on a similar topic that said to try this method to see if it worked). So that looks like a broken link because it is referencing a nonexistent thumbnail file. The third picture is of the same picture sent straight from the editor, which as noted had no option to sent to the editor as a thumbnail.
I hope this is helpful in helping me troubleshoot. I appreciate all the help and I am surpsied I seem to be the only person experiencing this problem. Maybe I'm just defective.