What version of ACF are you using? There are some differences between in the image field between ACF4 and ACF5. The image in your first link is for ACF5. ACF4 does not have all of the settings that ACF5 does.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
🤔 Curious about the ACF user experience? So are we! Help guide the evolution of ACF by taking part in our first ever Annual Survey and guarantee you’re represented in the results. https://t.co/0cgr9ZFOJ5