See.........they used my DD-214 from when I left active duty in 2011. I have yet to get my DD-214 for my ANG service because I am still in hence the title 10. Yes, I have 12 years active and 5 ANG.
Yes, because that was for the fully developed claim that you had filed. Now you are going to be approved for (at the minimum) TDRL at 100% from active duty. They may choose to put you on PDRL because you are stage IV and it is considered incurable.
Where I see the fight being is getting the original claim approved to the date of filing of September 2015. That is 12 months of C&P benefits that you do not want to leave on the table.