Mac connects to wifi while sleeping in backpack? At university I added a few documents to my print queue. A few minutes after I got home with my laptop still in my backpack, my printer mysteriously printed exactly two pages of the document I added to the print queue. 

I have power nap disabled.


Why would my sleeping laptop connect to my home wifi? Does this mean my laptop is advertising my MAC address and connecting to familiar wifi networks as I walk around the city? 
Why would my sleeping laptop print with power nap disabled?
Do I have any way of disabling wifi activity while my mac is sleeping? 


I'm using Sierra OSX on a 2015 MacBook Pro with retina. Thanks for looking!
Sleep doesnt mean off. Its still connecting to familiar networks. I'd either turn off wifi while sleeping or power it off.