I'm from South Florida and am taking the January LSAT

On number 6, I understand why the second sentence is irrelevant, but why is it not conditional? I feel like it would be. Can anyone explain?

I feel like the order is not following based on the previous video. It said the logical indicator would then mean the condition after is the necessary condition. However, sometimes on these it is not following. Anyone else agree?

What does the parentheses mean in some of these answer choices?