Yes - as @Classic says you need to click on either 'full image' or 'thumbnail' when you upload a file. Otherwise your images will look like the ones you have in your post. I could edit your post to show them all as full images but there are so many that I think it would be a rather long series of images in one post.
When you upload files you should see this:
View attachment 7724
So you just click on either 'full image' or 'thumbnail' depending on whether you want a large or small image. Try posting one or two here again. PM me if you need more help.