These models of Oster toasters have a special bagel toasting feature. When the bagel button is selected for models 6320, 6321, & 6322, the inside of the bagel will be toasted while the outside of the bagel will be warmed. The toaster will heat the center elements more than the outer elements and that may give the illusion that only the inner elements are working. This allows better toasting for bagels and English muffins.