Ànex i Rux

Well, in middle ages vassalized countries could vassalize another country but the major vassalizer didn't had any right on the vassal of the vassal. Even sometimes you could have a vassal of a part of another country and not the entire one

It depends on the population of the province. If you are demanding land that's a core of the country, they will very rarely accept it. If you try tu buy land that has been conquered and with low stability, they may accept it.

When i try to move the port or the army positiom the crashes permanently. I can't play the game until I reinstall it. Another bug with me map editor is that whem i change the connection of two provinces it changes the growth tax to 100%, the region to Iberia, the continent to Asia and sometimes the terrain to desert.