Thread:Tupka217/@comment-26295738-20150415185625/@comment-1038387-20150415190559

Because you posted it ahead of schedule, and didn't add the Image Template (most decidedly not "the same info"). Also, it's a jpeg; we prefer jpg for consistency.

But that first point is the most important. We don't like to upload images before the comic comes out, only a day in advance at most.

You uploaded an image without creating the corresponding page and under a non-standard name. That means it seeps between the cracks and is bound to get overlooked when the page does get created. Therefore, we set that rule. We don't upload sollicited covers weeks or months in advance.