Screensaver shows the same photographs every two or three minutes while I have 1600 pictures to select.

With Apple TV Screensaver ............ I have 320 pictures from which to select: Why do I get the same pictures every two or three minutes? Either very poor software engineering my Apple or arrogance by Apple TV. I set time delay for 10 minutes to allow all pictures to load before setting actual time delay at 2 minutes. The feature is worthless with this format,