I don't think the stalker's lewellyn, but I'm curious to find out who it is

probably his ex

I think the stalker smashed the door plate because he noticed that the hole is gone. Levellyn already knows that the door changed so he wouldn't get angry about that.
That makes me doubt him as the stalker too

Shavonne has about 28 or so exe's -- argh! But what I like about this story among other things; is how one answer can produce several more questions. I still can't figure out all the candles, for example (=・ω・=)