Is it just me, or does there seem to be a spate of questions about switching room lights by Arduino, and at the same time recognise that the wall switch is now in the wrong position.
Wondering if this is a college project somewhere?
Perhaps one of our friendly mods, inbetween eating, sleeping, having a family life and deleting spam, could tell if the ip addresses are from the same locality?
Post a few links and I'll report back.
It's no biggy..... was more of an idle observation than a concern.
But now you have me curious...
I noticed the same thing into the italian area of the forum. But I found that it's a thing related to the school, because a lot of students have prepared an home automation project for the exams of the last year so they were asking a lot of questions to know how to light on/off a light, open/close a parking box etc.. 
Depending on how you wire them, you can make logic gates and flip-flops from switches and bulbs.
This is real basic stuff I remember from school in the 60's and 70's. Maybe it's a topic again?