On line 188 of SCR_AmbientPatrolManager you are checking if the current number of AI / maxChars is below GetAILimitThreshold()

However aiWorld.GetCurrentNumOfCharacters() and maxChars are both integers, so the result of dividing them is always zero (or rounded?), therefore it is always (or most of the time) going to return false

I think you need to cast them to floats first:

isAIOverLimit = ((float)aiWorld.GetCurrentNumOfCharacters() / (float)maxChars) > spawnpoint.GetAILimitThreshold();