@slytheringoddesHi, there
What follows is a trend that I see in my data, but I hope it will be helpful.
Townies seems to be generated based on the World that you visit. For example, when I visit San Myshuno or Mr. Komorebi's World, Townies with a Japanese name are generated a lot, and when I visit a park, children and Teens seems to be generated.
In your case, there are many Aliens. Do you have a scientist career sim in your own sim, or did that sim operate an antenna or other equipment used by the scientist career? Or you often visit Sigzam by rocket? If so, many aliens are generated all at once. Vampires also seem to increase the rate at which vampires are generated if you interact with NPC vampires or live in Forgotten Hollow.
With the above points in mind, why not try the game without mods? If it still doesn't work, you may want to try repairing the game. Repair the games may also change the generation pattern.
Hope you be able to fix.
