She reopened it to respond to the topic and to say the reason why she was unhappy. And I don't think you've been around since she unlocked it. But also, admins (and maybe mods, but I'm not sure what the settings are) can post in locked topics anyway. I kinda understand your anger... and you were right to close it in the first place to stop further hostility, but the reopening of the topic was justified, so there's no problem. And why should the closer of the topic have to be notified when there's no real reason other than to let the person know? There definitely isn't anything wrong with notifying the mod, but there just isn't any reason either... he'll see it when he goes to the topic.
Anyway Steph, yeah, you've kinda known him for a while. You did tell me that before, but I forgot. Still, you don't REALLY know him yet. And if he likes you too, then you will get the chance to know him in the future.