So this happened after using the Unlimited/100 mb version. I sent a picture using Whatsapp using the share button to the left a few hours ago. Didn't notice until now when I took random sample pic to test the camera's modes that the delete button is gone! It was replaced by the last known app that used the gallery/camera = Whatsapp. Thus, when I click to delete, it opens up Whatsapp in the way it does when sending the current image to someone on my contact list. So, I had to go to manage apps, gallery, and clear data for it to return to normal. Pretty annoying bug if you ask me.