I am level 46 I have acquired 9 gold vouchers in total. One of my neighbours on level 25 has bought the waterfall which needs 15 gold vouchers. I have seen posts like this before. Something is not quite right with the distribution of these vouchers. I have tried all combinations of bars and jewellery and usually complete 3 or 4 boats a day. I am a daily player. I am really disappointed :(

