Sorry if this has already been reported...
I've had a Black Sacrament open in my quest log for a long time, the quest is for Trader's Cove. While doing the Dragon Bridge quest in Western Skyrim, I noticed that the game thinks I'm in Trader's Cove for the Sacrament when I'm Smuggler Caves for the Dragon Bridge quest. The circles appear on the map showing where the target is, but it's really in a different instance. I had no trouble completing the Dragon Bridge quest...but I did walk in circles for a while looking for quest objectives that weren't there before I realized what was happening.
I do not know if having the Dragon Bridge quest open and trying to do the Sacrament causes any problems, I turned the quest in before I thought to try the Sacrament.
XB1 NA
Your nerf suggestion is dumb. Learn to counter other players instead of having the game rebuilt to your ability level.