I have been facing this issue since a month where a neighbour access point is acting like a honeypot, all the nearby android devices are getting connected to it even after forgetting the network.
The issue is much like described in this link
I need to find a way to get rid of this since its also found to do some active network attacks by stealing creds, though I can't prove it. But still its getting connected unusually even after forgetting. Please help.