Lauren's dashboard

for two days i've been trying to upload new pics for my thumbnail and background pic. at first it would upload a pic and when i would upload another one it wouldn't show. so i would upload a third pic and the second pic would show. also my thumbnail wouldn't show but my pic would only show. now i can't even delete my current pic. and when i would try to the background would chnage completely to some old background. this is so frustrating. tech service help me :(