Is there something I should be doing when I start a section to answer questions and exit it to come back and it says to 'Revisit'?

Where you see a button labeled "Revisit", TurboTax is just asking you to click there if you want to revisit that topic, since you already made entries there. It doesn't mean you have done something wrong.

In some versions the button says "Update" if you have already made entries in that topic. It says "Start" if you haven't yet visited the topic.