@-Yarn_Yoshi-
When you upload images, they must have unique and different file names from any other images you have upload in the past, otherwise, as in this case, the second image (with the same file name) overwrites the first image.... your first image was the reverse and then you uploaded the obverse using the same file name.
For future reference, please use unique file names for each image.
You may edit your post and change the file name of one of the images to show both obverse and reverse.
Hope that makes sense.