I think you might be right. Seeing the same thing on the "Blood Lust" galactic event as well.
Also, I have galactic events on as "Random" and they are happening in my current game pretty much every other turn. Methinks that's a little too often.
Edit: actually what does "Random" mean in the game setup? I took it to mean something less "designed" than the options in the list. But perhaps it means "pick an option from the list and don't tell me what it is". I think that could be clearer.