It seems odd..

Next time we paddle together I'll check it out.
(With me on my new 14x 29 Glide)

What did Naish or a Naish dealer have to say about it?

There not from heat are they? Body boards do this when left in the sun for a very short period of time, actually had a short board do it as well

thats a weird one ...defiantly a chemical malfunction....

..
if you get a replacement can i have this one

I was told by a manufacturer (SIC Maui) that keeping a board in a hot damp bag can cause that sort of thing. They felt that padded bags were good for protection while moving boards around, but they were against carrying a board in a padded bag on top of a car for any length of time, and the results they described were pretty much like in your pictures. After talking it over with them, we use a thin UV cover with elastic that just covers just one side of the board for sun protection, and still allows it to breath; so far so good.