Respected Sir, Greetings !!!
Having learnt your situation meticulously, Kindly observe below-mentioned solution ;-
The point to focus herein is that, Like every situation demands I strongly recommend you to Firstly apply wisdom than hammering on court procedures as you can knock its door any time :
POINTS TO KEENLY OBSERVE STEP BY STEP
Step 1 : Publish a Paper advertisement submitting the facts for the wrongly entered property measurements. (Same like Change of Name)
Step 2 : Take the paper cutting along with the complete paper and execute RECTIFICATION DEED in the office of the concerned Registrar or Sub-Registrar where your property jurisdiction is situated and where SALE DEED has been executed.
Step 3 : The above mentioned RECTIFICATION DEED will cost you charges which you can ask the concerned Sub registration office.
Step 4 : Simply attach the RECTIFICATION DEED to the SALE DEED and sell the property with both of them and with his no one should doubt on its originality.
Remember, Do not opt for cheap steps, Do follow steps that will make you spend money but brick wall is always better than sand house.
Hope every thing is absolutely clear. Still any issues consult me. Good Luck !!! Adv. Masood.