Why won't my پیپر وال go into the پیپر وال section in images, even if I select for them to be put in the پیپر وال section?

An image has to be a standard پیپر وال size in order for it to be accepted as a پیپر وال - even if you're just a pixel یا two off, it'll put it in the تصویر section. A few of the most مقبول پیپر وال sizes are 600x800, 1024x768, 1280x800, etc.