Ok, so when I update my chapters, I will sometimes add pictures or music, But on my screen, the pictures keep disappearing. What I mean by that, it the fact the I add a picture to my chapters, but then for whatever reason, it doesn't appear. When I upload the chapter it's there, but when I check back on some of the chapters, it's gone.

I just want to know why that happens, because it's beginning to get on my nerves, So can someone explain why that happens?