Ah, looks like you set a featured image in the sidebar and also set the image directly in the content area as well. We thought about removing the featured image option altogether, but realized many writers who are comfortable with WordPress might prefer to use it so we left both options available. Using the featured image option is probably the easiest option for most with the least amount of steps.
Both your articles are now fixed. :)
Also note that even if you hadn’t reported this issue, we would have found and fixed it in our daily run-through. So, rest-assured, we’re always looking out for ya.