I will suggest you take the help of a legal expert in this matter. Ask the seller to rectify the errors through confirmation deeds. It will create a problem or may be registrar will not be agree to register the property during buying process.
A Confirmation Deeds are known as Correction Deeds. If there is any errors in the sale deed, it can be rectified through Confirmation Deeds. They are entered into between parties to rectify any errors made in a previous deed. These errors may include typing error, misspell name, error in property description, or any other error in execution of the documents. These mistakes can be later corrected through a deed of confirmation.