I noticed while in the downloads section that some of the "images" are not in image format. For example, I downloaded the OpenElec file and it is called "OpenELEC-RPi.arm-3.2.0.tar". But when you extract it, it just creates a folder, not an image file. I found another site that has the openelec image files and it was called "OpenELEC-RPi.arm-3.2.0.img.tar", notice the img in the file name. When I extracted it, it was a proper image file that could be put on an sd card.
But the arch and rapbmc files in the downloads section have img in the name, making them proper image files. Why is this?