Photos loading

I can't see the photos I put into the website photo grid. They often turn out blurry, and when I try to delete them, two others go either invisible or have a "Sorry, your photo hasn't loaded" (or something to that effect) message. The message may just show up without any trigger on occasion. Whenever you press the present or view buttons, the screen turns white. Also, it's impossible to get rid of the "split layout". There's no button, and after a while, it just turns gray.