Property law

I am powerof attorney holder. POA is registered . Stamp duty paid as per what one has to pay for sale deed registration. Wheter my name inclded legally in 7/12 Daiary? Can I sale the land property on which POA is hold. After POA execution Legal hairs of POA donar has right to enter in 7/12 diary, as they were minor in 2008 when POA was executed. Can sale deed be executed in case of 1500 square land. I was told in 2008 that sale deed can not be executed because land is very small. in maharashtra minimum 11000 square feet land require for sale deed execution. is it true?