This should be impossible right!!
I switched the light off using the HE console, and the log showed this.
I can physically not get out of the chair & reach the light switch to also turn is off at the swicth for this to be correct!
Depends on the device and driver being used, the generic zwave switch driver is the least accurate in this regard.
Which device and driver are you using?
I believe you're seeing the Hub send out the off command, followed 3.5 seconds later with the response from the device.
There's a large thread here on this topic and @JDRoberts#4 is probably a factor. The reply from the device gets altered along the way by older repeaters.