I'm no teacher, but here's my go:
No, this means they are supportive.I am flattered that they should be so supportive.
Does it mean "If they are so supportive, I will be flattered"? (The speaker does not know whether they are supportive, but he probably will. )
Ligh-year is a unit of distance. This means she was way out of her league. She hadn't what it takes (skills, knowledge, strength, willpower...) to do what she was doing compared to the others (eg. her colleagues, the other players, etc.).He hadn't meant to sound belittling, and yet Sophie was light-years out of her league.
Couldn't use the information. He didn't know where the sound was coming from, or what it meant.Ross makes a high pitched noise and Alan doesn't know what to make of it.