I am amazed that this bit seems to work flawlessly, even when I disable the app or switch off the phone!

Recording network cells with all different modes in Settings => Mobile network seems to have helped, as well as reducing two situations to one.
With 8 cells recorded now, I need to move pretty far from my house before Wifi switches off (looong after it looses connection to my access point) but that's OK because I live in a residential area where it's unlikely that Wifi access points scan who's moving about (like e.g. in a mall).
I guess I can still fine-tune this by re-recording the cells under slightly stricter conditions (yesterday I even held out the phone over my balcony).
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One more thing I'd like to ask:
When I start Situations it often seems to think that the phone is charging (What = Charger) even though no cable is connected.
Any idea what could be going on there?