Yes, those 3 from Desolate Mine had the same problem as the Bleak Mine guards - a find player action on an AI package with insufficient restrictions on when it should work.
Again, Ancotar only has this at one specific stage of the quest, and only when you're within 1000 units of him. Unless something has altered his AI pack in your game, he should not be capable of doing this once you've spoken to him in Zero Invisibility. The quest doesn't even need to be fully completed.
I just want point this problem of NPC following you after getting out of jail is very common!
After Ancotar I experienced this problem at least two times in the last days and with new setups each time:
1) Rangers from http://www.tesnexus.com/downloads/file.php?id=29386 appearing after serving jail:
Reason: I upgraded from version 1.5.1 to version 1.5.2 without making a blank save.
2) Ruslan appearing after serving my jail:
Reason: http://www.uesp.net/wiki/Oblivion:Imperial_Corruption malfunctioned at the end, MS26 Quest stagnate to stage 90
I.E. Ruslan and Luronk gro-Glurzog reporeted the crime but Itius Hayn didn't arrest Itius Hayn. I had to travel to Itius Hayn and talk to him, then he decided to arrest Audius.