Looks like to me that you found it. If you didn't see it go down and didn't find it in 2 days of looking are you 100% sure you killed it? Lots of time for someone else to give a fatal blow with bow, mz or gun between Oct 3 and when you found it.
I don't tag pickups, just deer I kill. Looks like you have it at home and in the house, do whatever you are comfortable with.