Over the course of a game, I built up a fine army of agents.  Just under half of them were in one opposing empire, the others were all currently idle.  I reached 'advanced' for that empire so decided to remove the agents, only to realise that it was working as if I was nullifying agents on their planet- I was losing an idle agent every time I removed an agent and also not retaining the removed agent as well.  I started with about 17 agents and was left with 1.

The latest patch meddled with espionage, right?  I started playing this game with the patch released last week and found the error with the patch released this week.