I am looking at some land (15 acres) to buy. The maps are not correct in the land registry , the land is mixed up with another farm. Years ago the origonal farm was divided in 2 but the process was not completed properly. The 15 acres are now being sold through an auctioneer by private treaty under the condition that the purchaser will have to sort out the maps - is this common practice? How long could the process of sorting out the maps take?