I was stuck in solving puzzle 12. I had 4 storm in a row which washes up the crashed boat debris, but I still cannot get the builder trained to be a master. I only have this one guy clearing the beach 4 times.....by the fourth time, I realised that the experience for construction became stagnant and did not increase at all......I wonder when this stagnancy started, may be after the 2nd storm event......any comment?