Buildings misplaced themselves!

Hi Everybody!

I'm a newbie here, in search for a little help.
I've just finished my first map a couple of weeks ago, and got so excited with the editor that I decided to convert it to a small campaign. So, In the middle of my second map, I've found a really weird thing.

I have placed some buildings and units in a region, trying to make it look like a city. Some are custom buildings, some are simple farms. Some are doodas, like buildings, and some are player buildings. Everything seems ok, but when I try the map, some of the buildings, of the rightmost part of the region, where misplaced! and some of the villagers and dogs too! but other units, and buildings remained perfectly in place. Doodads werent affected. Well, has anyone seen this? It's quite weird to have some farms in the middle of the streets, and locations seem to be random. (same locations every run, though).

Can anyone help me? Ah, and please excuse my english, I'm not native.

Btw, I've been watching this forums for a couple of weeks (lurking, indeed. This is my first post), and seen some heat around the latest topic: map stealing and protection. Well, I've done some maps for other games in the past, but never released them. I've decided to release my maps, this time, but never thought about people stealing them. I think I haven't done anything that other people can't do, and If I ever do something cool the rest of the commmunity haven't thought before, It could be good to share it with them. I suposse other people getting credit for your work wouldn't be nice. So I read about it and stumbled upon the idea of using "watermarks". But...

what kind of watermark? I'm not familiar with the concept, what do you people suggest when you speak of adding watermarks? Is there a common way? or do you just mean "adding some special feature hidden in the map so you can prove you did the map because you know of it"?

Thank you very much for your patience,

R.