There are at least three issues:
1. AI often needlessly goes and kills itself against the precursor anomalies
2. In this case, with a non aggression pact in place, it's strange that the AI is able to survey it when I have a fortress being owned here. Also, if I've a fortress that I took ownership of using the Xeloxi ability by the converting the previously existing pirate fortress, how is a new fortress spawning?
3. New fortresses keep spawning at this location when anyone fails in a survey, and when I take ownership of the fortress and move it away.
Thanks,
Rohit