X3, it looks to me like the spinnaker was not fully hoisted. If you mark the halyard at the block when it is fully hoisted on the beach, you will know on the water if you have it fully hoisted. I have on many occasions thought that I had the spin fully up due to pressure when I was still 2 feet short. The skipper then had to go lower to release the pressure so that I could hoist the last bit. I'd personally pull that tack line a little tighter, too.

-Rob V.