Bob,
Upload the smaller/resized images to your CC gallery (~ 50kb to 90kb is good).
Open the picture in your gallery after uploaded and right click on it to see the properties.
Copy the full URL (
Http://.......) properties of the image and choose the "insert image" icon (looks like a yellow postage stamp).
Paste the full url in the "insert image" pop up window (delete the "http://" that defaults in the pop up window)
Preview the post and submit.