Can you provide a screenshot/photoshop of what you're trying to do please ?
There is another way to active is by adding a container and add table to container, format the container.
Hope this help
Thanks guys. I ended up copying and pasting the format from another sheet that was set up correctly and that resolved it. I got tired of looking through / trying the different options to see what would fix it and was grateful that copying the format from another sheet fixed it.