A few of your answers were wrong.

1. There are 13 knights in KotR. There is nothing to suggest that the last figure is King Arthur other than personal opinion.

8. Since when were Yuffie and Nanaki members of AVALANCHE? Anyway, the isn't a noticable age gap between Yuffie and Nanaki. Yuffie is 16 and Nanaki is said to be 15 or 16 in human years.

9. Sephiroth doesn't have a limit break.

10. There are six Turtle Paradise flyers.