NO LOGGING STILL HAPPENS. it' not retained via memory. this is TRUE for ALL ROUTERS. A log is simply a retention of commands given to NAT.
For instance, if you disable LOG and enable SYSLOG you're still gunna see output, WHY? Cause the NAT is still doing things.
Also this is a router, not a tree and your network is a network, not a forest. If you want the unit to stop producing log entires, uncheck the boxes. IF you want the unit to stop responding to NAT commands (and there by never creating a log entry even if it's not retained by the log system) unplug the device and put it in the closet and read a book. 
I guess the detail is in "retain through memory"
