In that same development, the realtor sold the same lot to 2 different people. Actually, the one couple bought the lot next to the "best" lot but didn't check the boundaries. Buyer beware.
This story and your point should serve as a reminder to everyone that landowners should know exactly where the legal boundaries of their property are. Your legal property rights start and stop at that line. If you don't know where it is, you are out of luck.
I had a summer job from high school through college as the "rod man" on a land survey crew. The company I worked for did a lot of title (property) surveys prior to sale. One of the worst cases of being "over the line" had one home with a concrete in-ground pool, an out building and a long section of iron fence OUTSIDE the property line. The property line actually intersected the pool. The owner wound up paying his neighbor thousands of dollars to purchase the land he "acquired" over the years of not paying attention to where his property lines were. We were very surprised that the zoning for the pool and out building or any property tax assesment or title insurance updates didn't catch this mess earlier.
This kind of problem can happen to you unless you rent. Even if you own a condo or townhome. Don't ask - its hard to explain but the effects are just as bad.
jriemer