Thanks but you can't demolish them after claiming anymore, that was stopped so you are now left with the old rafts slowly decaying all over the place. The shipyard thing is definitely a bug, the timer ran out as normal and destroy became available, it just does not work. We tried unclaiming and reclaiming, and we tried turning the build for all option on and off but nothing resolves it so it would need to be looked at by the support team, so we are probably stuck with a claim we cant build anything else on because that is blocking half of it, but reporting anyway.