Alexandria has not been a part of the District since before Jones Point was built:
In 1789, Alexandria and a portion of Fairfax County were ceded by the State of Virginia to become a part of the newly created 10-mile-square District of Columbia. Formally accepted by Congress in 1801, Alexandria remained under the aegis of the new federal government until it was retroceded to Virginia in 1847. In 1852, it acquired city status and gained a new charter.
(from
http://www.alexandriacity.com/1/history.asp)
For whatever reason, Shanklins think Jones Point is in DC. They need to re-think this and fix their listing if they have not yet done so.
