The series resistors would be used as current shunts for external monitoring of the current to the backlight. Attaching a voltmeter by tweezers to the resistor (or probes to suitable test points), and dividing the resulting voltage measurement by 10.2, yields the current. When product testing has been completed, there is no longer a need for these current shunts, so they are replaced with zero-ohm jumpers. Presumably, the circuit will work either way, if it uses a current-mode supply.
I don't know the significance of the other question.