Revealing mistake: In every episode, the windows in both the kitchen and living room areas never reveal any scenery outside them during the day or any reflections from the inside at night.
Revealing mistake: When the fashion club is looking at clothes in the store, Quinn and Stacy are looking in the mirror and their reflections properly show. When a slightly further angle is shown including Sandy (who stands right next to Quinn), Sandy's reflection does not show in the mirror at all (even though she's standing right by it). Also, no reflections are shown of any scenery in the store or the other two girls (who are within reflection range) - again, just Quinn and Stacy are reflected.
Answer: "Mack Daddy" was a 90s phrase meaning "Ladies man," and Mack simply doesn't like the stupid nickname.
Brian Katcher