Pinterest Save button displayed on some posts and not on others

I downloaded the Sassy Social plugin to have access to the Pinterest Save button only (that is the only presence I have on social media). However, only some of my posts have the Pinterest button on them. I am using WP Recipe Maker. I have set up my Template to include the Pinterest button. I have WP Recipe Maker pointing to my defined template. I don’t understand why the button shows up on some posts and not others. Can anyone tell me?