I have, of late, been plagued by multiple characters at Fort Dawnguard. At various times I have had 11 or 12 Israns, Gunmars, Sornes, Florientiuis and Vori. I have tried going back with various MODs disabled and thought I had zeroed in on Populated Forts but then in returning there were 2 Gunmars. So I then disabled Immersive Dawnguard and went back only to find 11 Florientius. I then tried to click them to get a RefID to see if the first two characters referred to the load number for any MOD but the numbers I got were FF006040, 41, 42, 43, 44, 42F7 and 00603F. I then went back to Nexuus MOD manager but no MODs have the FF prefix.

Does anyone have a GUESS as to what is going on and how to get rid of it?

I have not seen this in any other area of the game.