Same here.

Ditto

Well, from my point of view, this scene just wants to show
that Simba and Kiara are quite different:
-When Simba
was a cub he was so much looking forward to be the king; and
now as an adult, he watches the rock with great pride.
-However, Kiara thinks being queen is no fun, so she
looks at priderock, thinks about her future and feels... a
bit scary.
So in this scene Simba just notices Kiara's
confused face, and he realizes that she's too young to see
the rock with the same pride as him.

But well,
this is only MY guess I just hope it helps

Thanks! Maybe we will just never know...

If you look closely, a star flashes in the sky,maybe this is
Mufasa's star?Simba looks at it and remembers his
father.Kiara is confused because she doesn't understand what
Simba is saying because she is too young.

I think Simba is symbolizing the royal family by looking at
the ledge. The ledge could be considered the throne from
which the king rules, and that was Simba's destiny. He is
just telling Kiara that her destiny is to be queen.

He probaly thought something was wrong, but when he saw it
again, he saw nothing wrong (this does not mean the rock
itself)