Turn the A/C off on start up and they will stay off.
Second, its normal for either one of them to shut off when ever the ECU tells them to. One fan is for cooling the engine the other is to cool the A/C condenser. When you turn the A/C on, the driver (left) side fan will come on, then shortly turn off, then on and off again.....ect.
This is not new of any vehicle, about 90% of vehicles from the mid 80's all do this.
Driver side = Left
Passenger side = Right