Ah, I think Draco is vacillating back and forth, because he is very young and therefore not actually all that mature yet. And he is *quite* used to his mummy spoiling him rotten. Harry, too, is incredibly inexperienced and doesn't really know wtf he is doing here.

But my goal has been to reveal things through their letters (Draco, primarily), and I hope that when all is said and done I will have written this well enough that you will be able to go back and think, "Ah, yes, he is like that. I see it in his letter."

Much like the way Harry could use Draco's letters, utterances, etc., to figure out that Draco is not straight, and probably not even bisexual.