I see something similar, where one switch (S-GuestBedroom) is inadvertently controlling another (Bath1.Vanity). I took a look at the device table and, sure enough, the unintended responding switch was in the table, along with the intended device.
Tried removing the controlling device and re-adding, twice. First time used 'Remove Existing', second time, used 'Add devices found in links, remove existing links'. No difference.
So, I ran the Diagnostics -> Show Device Links Table
selected 'Compare' and found issues where there was a reference to the controlling device in the vanity device's table
I have no scene's or programs that would relate these 2 devices.
My solution was to save the device table, edit xml by removing the 2 stanzas (changing the index count appropriately) and reloading.
It fixed the mystery of "Who the hell keeps turning off the bathroom light?"
CONTROLLING DEVICE: https://drive.google.com/file/d/0Bw0M_W3SMHLMenFCczZNVU1qLTg/view?usp=sharing
BEFORE: https://drive.google.com/file/d/0Bw0M_W3SMHLMZUFWbnhfNUJyM2c/view?usp=sharing
AFTER: https://drive.google.com/file/d/0Bw0M_W3SMHLMZ3l0QnpLNE04TDQ/view?usp=sharing