f'' oddities on WP 34S

[lrdheat]

On the function 3 root (x-2), f'' at x=2 produces ~353 instead of an infinite error...wondering why it comes up with 353.

Another related oddity...when solving f'' the above function to find its root, it produces a result of 2 which is a sign change, but is the result of a discontinuity.

Are these behaviors intende?