Cannot Disable Categories in Homepage/Frontpage Settings

Hi, I had my Simple Catch Theme set to a static homepage (Home) and then also had the posts page point to Home. Originally, in the Homepage/Frontpage Category Setting, it had been set to Disabled, and I had all my most recent posts show up on the stage homepage regardless of any category. I tried to experiment recently, and selected some categories to see what would happen. And now I cannot set anything back to disabled. Every time I click the Disabled button, and then press save, it reverts back to the previous setting of the categories. The home page displays as an error now. When I select the categories, it doesn't show up either... Any words of advice?