Duplicated Image

Hi. I’m using the theme Expositio and I want to display images. However, every time I do insert an image into the post, the image appears along with the original size of the image. So two of the same image appears. One is hyperlinked (the one I want to insert) and the original version of the image.

Does anyone know how to properly insert images for this theme? I’m using it to showcase my portfolio.