You don't get a chance to score an extra point, you get the extra point if you've scored higher than the same finisher in the other LCQ scored in the heats.
LCQ1 - 3rd, 6th, 8th, 9th
LCQ2 - 4th, 5th, 7th, 10th.
I see the argument that if you've finished 3rd on points, and are in LCQ 1, then you'll get more points for finishing 2nd than whoever finishes 2nd in LCQ 2 does. That's just the advantage of scoring the 3rd highest points score though.
If the 5th placed rider from LCQ2 finished in the same position as the 6th placed rider did in LCQ 1, they'd get more points because of their score in the heats.