Question: Do Zach and Gracey ever get together?
The Snowplow - S3-E3
Question: Is Larry Hemsworth a real person, and/or is there another Hemsworth brother?
Answer: No, he is fictional. The joke is that, despite being handsome and charming, Larry Hemsworth is so overshadowed by his brothers that nobody else has heard of him and he feels like a failure.
Heavy Meddle/Making the Case - S1-E2
Question: In "Making the Case", why were Luan and Lily angry with Lincoln about the video? He didn't record any embarrassing footage of them.
Answer: Luan is mad at him because he broke the unspoken rule of posting a video without the person's consent. Lily is a baby and is probably impersonating the older sisters she looks up to. They are mad so she is mad.
Question: How is the couple, mother played by Mandy Moore, able to adopt the orphaned kid? Given they're a poor couple with two kids already, wouldn't the hospital hold off on this for awhile and try locating the child's parents?
Answer: Where did you get that they were poor? they were middle class and had their own home.
Answer: Because that would not have made for an interesting TV series.
Answer: No they are announced to be siblings in the second season finale.