Elle, here's a little tutorial. Save the photos to your computer and keep in mind where you put them (I keep a special folder right on my desktop so I don't have to go hunting through directories.) Then, when you are writing your post, you'll see the "Add Photos to your Post" section beneath the text box. Click on the "Add a Photo" box and you'll get to enter or select the destination where your photo is stored. Select the photo you want, and click "Open." It will appear at the bottom of your post.
To add another photo, just lather, rinse, repeat...
ETA: Ah, I think Lemonade has identified the problem.
