Is this a common thing with supporting army?

Hey! Today I picked up the game again, and found something that could probably happen earlier too, but I haven't noticed that time. Anyway, I found it weird so I thought I would share it here.
My story in screenshots can be followed here. I'm using the Warsword Conquest mod for the game, but probably it's not what's causing the "problem".
So, I was venturing into Bretonnian (one of the mod's faction) territory to loot some peasants to upgrade my armies and get some XP and money. I was almost caught by some patrolling troops when this raid party (Pirate Kingdom, another faction) arrived and for some reason saved my ass. My relation with them is 0, absolute neutral. (We're after the battle in the first picture. edit: The trees made it hard to get everyone in the picture, so the red circle indicates my position.)
Now, I speak to the guy on the front, his name is Captain John Gruesome Black. What I notice is, that all the other "lords" have lined up for battle behind me. They're from the same faction. (Second picture.)
Although my initial intention was different, I had to try if this was for real, so I decide the "deliver my demands" and proceed to the battle screen, where I do have more than the 35 units I originally had. (Third picture.)
I never fought the battle though. But I think it should not work like this, so I documented this anomaly.
Has anyone see this before? Is this because of the mod? I think I have nothing else to add.

Submitted November 19, 2017 at 08:04AM by Anonymus9809 http://ift.tt/2zTMWDS