http://community.wd.com/t5/WD-My-Cloud/FAQ-Twonky-DLNA-Media-Server-Setup-amp-Use/td-p/858810
Twonky settings get damaged by the MyCloud dashboard; even WD tell you to use the Twonky UI for reference only, not to make control changes.
The problem with your changing settings is likely to be due to mycloud reboots or firmware upgrades.
Or maybe your neighbours are simply accessing the Twonky UI and making the change (an, you say you have the ui password protected)… Personally, I’d stop sharing internet access if I didn’t want my neighbours to access my files…
