flare 2007 wood deck

[morisios]

Hi,
I have just bought a new flare 2007 , 88 liter
This board has a wood deck. there are some areas on the deck which have black stains (look like under the wood deck)
Is this normal ?

Further more, after I have sailed it once it looks like there are some narrow cracks in the wood layer that I did not see when it was taken out of the box.
Is it a familiar issue or should I be worried about it ?

What's under this layer of wood deck ??

Thanks in advance
Tal