I'm really not sure about this, I think you may need to consult an immigration lawyer about your case scenario. Minors reaching legal age is one of the biggest problems faced in the US and nothing much has been changed about it over the years. If this does not work for you and you can't go with your dad there is another way however where your father can still sponsor you for a green card when he gets his. This route however can up to 6 years for the case to be processed. Who knows though, I think it might be OK in your case but I would suggest contacting an immigration lawyer for case scenarios such as this. I don't think you will get an accurate enough answer on here for questions such as this, Good luck!
DV-2011 winners from Srilanka
Hello dear friends .. Thanks alot for blessing me
But i have 50 % /5-% good/sad news
My father also dv winner. so he got interview succesful with my family included my mother, Brother and sister However my visa was rejected
Because they said. My age is reached 21 now/ Therefore my age is now 21 years 8 months but my father applied for the dv when my age was 20 years 16 days
As US law ... I was eligible for apply to DV with my father. So Why did tehy reject my visa?
As US law DV-2011 instructions Q14 says ...
14. NUMBER OF CHILDREN – Entries MUST include the name, date, and place of birth of your spouse and all natural children, as well as all legally adopted children and stepchildren who are unmarried and under the age of 21 on the date of your electronic entry (do not include children who are already U.S. citizens or Lawful Permanent Residents), even if you are no longer legally married to the child’s parent, and even if the spouse or child does not currently reside with you and/or will not immigrate with you. Note that married children and children 21 years or older are not eligible for the DV; however, U.S. law protects children from ―aging out in certain circumstances. If your electronic DV entry is made before your unmarried child turns 21, and the child turns 21 before visa issuance, he/she may be protected from aging out by the Child Status Protection Act and be treated as though he/she were under 21 for visa-processing purposes
Please read underlined part...
Can my father appeal against the KCC or US embassy of Srilanka with DV case ?
KCC did not inform about the problem until They sent the 2nd NL. So I don't know about that. This is KCC's fault Am i correct?
Case No : 2011AS00033XXX (CITIZEN OF SRILANKA)
Enter the lottery : 2009 Oct
1st NL Received : 30/05/2010
Forms back to KCC : 04/07/2010
KCC received : 28/07/2010
2nd NL Received : 10/06/2011
Police clearance : done . (13/06/2011)
Medical : done (06/07/2011)
Interview Date : 7th July 2011 at US embassy,colombo
Interview successful: successful (My family get approval for the visa but embassy has rejected my visa)
Visa pickup : 12/07/2011
POE : Newark,NJ on next month
GC Received : waiting
SSN Received : waiting