1) since it was marked as residential land and had well planned layout duly approved you were entitled to purchase the land .
2) your sale deed has been duly registered with sub regsitrar office
3)Section 101 says that land, if not used till five years, from the date of taking possession, should be returned to the original landowners or to their heirs or to the land bank. While the original law said if acquired land is not utilised after five years, it should be returned, the ordinance issued BY NDA govt has amended the provision from a “period of five years” to a “period specified for setting up of any project or for five years, whichever is later”. Thus, an entity with unutilised acquired land can keep it for the period it specifies for setting up the project, even if it is much more than five years.