Oh gosh Unreasonable, she is batshit crazy. I, too, think she wanted your address just to harrass you more, and she might even have shown up 'to help'.
There was a woman a bit like that in a group I used to belong to. Luckily, I wasn't the object of her obsession. The woman who was the object contacted me by text one meeting day, to say she wouldn't be there as she'd had a health scare, with ambulances etc, she'd been blue lighted to hospital the night before, but was home and all fine now, just very tired. All the time I was trying to relay the message, the mad woman was interrupting, at first to say "oh I didn't see any ambulances" right the way through to "yes, she's very ill, I'll be visiting her later in hospital if there are any messages, if you want to wish her well just tell ME". I was happy to say very very firmly (and quite loudly) that she was fine now and home "so no need for you to worry; she wants to be left alone." very pointedly.
That woman just wanted to seem like she was the closest friend and knew everything about our friend, that she was first point of contact and relayer of news. Really, she just wanted everyone to think she was important, and focussed on our friend because that friend was the one who had got the group together.
Do you think Softzilla has picked you because she thinks you are the lynch pin, so she wanted everyone to think she was closer to the most important person than anyone else? I know you don't see yourself like that, but maybe because you had friends in a number of different groups she saw you as THE person to hang with?