HAMMOCK DUNES, Fla. (AP) -- A dream beach house in Florida has turned into a nightmare for a Missouri couple. Six months after the custom house was built along the Atlantic Ocean near Palm Coast, Mark and Brenda Voss learned it's on the wrong lot in the gated Ocean Hammock community. Mark Voss tells the Daytona Beach News Journal they're in "total disbelief." The couple own 18 other residential lots in the community. They bought the lot in question in 2012 and hired Keystone Homes to build a three-story, 5,000-square-foot vacation rental. But it was instead built on the lot next door, which is owned by a North Carolina couple. The Vosses hired a lawyer, and Keystone vice president Robbie Richmond says the company is trying to negotiate a settlement between the lot owners and other parties.