There’s a lot the city doesn’t know about the extent of problems with its $67 million “smart” water meter program. But it did know at least two years ago that problems existed, emails released this week show – a fact that conflicts with earlier statements the city made about an April 2016 meeting between water department officials and the company that makes the smart meters. Since 2010, the city has spent roughly $7 million to buy 74,000 Hersey-brand water meters from Atlanta-based Mueller Water Products.