Both are normal.
The 'recirculate' button is also the REST button.
This system is designed to keep the car interior warm with the ignition off.
It runs the fan on low and has a small pump mounted in the well in front of the passenger front tire that circulates the hot engine coolant. Pretty neat feature.
Engine Heat Utilization (REST)
With the engine switched off, it is possible to
continue heating the interior for a short while.
Air volume is controlled automatically. Select a
temperature for each side of the passenger
compartment. Set the air distribution control switch to
the desired position.
To select, turn the key in the ignition switch to the ACC
or the OFF/LOCK position or remove. Press the recirculation
button. The indicator light in the button illuminates.
This function selection will not activate if the
battery charge level is insufficient.
To cancel, press the recirculation button. The indicator
light in the button goes out. The system will automatically
shut off if you turn the key in the ignition switch to
the ON/RUN position, after approximately 30 minutes,
or if the battery voltage drops.