User blog comment:AndrewBrauer/Everything Wrong With Brawl in the Family in 6 Minutes Or Less (CinemaSins parody)/@comment-31789809-20170607123234/@comment-31563773-20170607132050

Uh, because Lisa was carrying around that chart and clearly said what level they were at while he was RIGHT IN FRONT OF HER. That doesn't mean Lincoln knew what it actually meant, but he did know he needed to get away from his quarreling sisters. And you're still ignoring the fact that Lincoln did not know inner workings of the protocol the day before.

Why else would he give a confused look about having to eat the same meal twice? Why would he look at 3 of his sisters oddly before trying to pick up the remote? Lastly, why did he ask about the kitchen and bathroom being blocked off? (and those are just a few examples)

You keep focusing on that one scene which occurred near the end and not looking at the whole picture.