While playing with Week One (b42), I noticed some bandits spawn and just remain stationary in their position until they spot the player or until he comes close. In that case they attack. I'd assume they are the Wanderer type of bandit but they don't walk anywhere, they just remain stationary. I was still in the first week, on the 5th or 6th day when I noticed it, and I was far away from towns, in a field.

Are Wanderers supposed to physically move around the map or they just spawn like this and wait for the player? The ones I described above were indicated by a red bandit icon with a pistol.

And what does a bandit search party actually do? (the ones indicated by a red bandit and magnifying glass icon) Do they walk around and look for the player?

I changed the clan settings a bit, switched the AI of the first clan (Desperate citizens) from FRIENDLY INDIFFERENT to RANDOM (BANDIT/FRIENDLY), maybe it has to do with that? The guys I described belonged to that clan.

I also have the Bandits Extra Options mod but I doubt it can mess up with the spawning system. I also tweaked some settings there, namely the "Allow raider AI" (set it to on), and tweaked the bandit safehouse generator spawning settting.