At first I thought it was a glitch and for some reason the Dragon that I just killed was like following me but nope, this ones a Blood wheras the other was Ancient also this one still has his bones along with 380 gold.
I also received a free Dragon Soul.
I guess someone else killed him with range attacks, prolly a bow because I didnt see any obvious signs of a mage close doing any casting.
It feels kinda like one of those online multi-player games where others are around killing stuff also.