Apple

So I just got a new TV and I'm trying to "break it in" (its an OLED so playing content every day to get rid of vertical banding). The Apple TV is perfect for this since you can set it to show its aerial screensaver for a bit until it goes to sleep, which is followed by the tv turning off.

Previously the settings on my Apple TV was something like never, 5 minutes, 30, 5 hours, and 10 hours. It was set to 10 by default, but I set it to 5 minutes just to confirm that everything worked correctly, which it did. But when I went to change it back to 10 hours, now that option is gone and its in one hour increments with 4 hours being the longest it'll go. What gives?