Back of Original Image Appears in Scanned Image

If an image from the back of a thin original appears in your scanned image, make sure you selected the correct Image Type setting for your original and select the Text Enhancement setting in Epson Scan 2. You can also select the Remove Background setting in Epson Scan 2.
Note: If you select Color as the Image Type setting, you can change the level from Standard to High to remove more of the background.
If the image is still visible, you can also select Black as the Background Color setting in Epson Scan 2.
Related references
Additional Scanning Settings - Main Settings Tab
Additional Scanning Settings - Advanced Settings Tab