Ducal claim war on my vassal, without war with me.

[Leisner]

I have just pressed a claim on Montferrato, and after I won the war, the now-count became my vassal. At some point during the war, the duke of Savoie declared a ducal claim war on the same count, and the war continued after I had won the first war, but only against the new vassal.
We are both inside the HRE.

A short while ago, I pressed my own claim on Capua, and while I pressed that claim, my wife, the duchess of Toscana, pressed a claim for one of her vassals (a courtier AFAIK), and after I ended that war, we immediately went to war.

Shouldn't both wars have ended after the holding changed hands?

How to duplicate. Well, I don't know, as I have no idea why I am not in a war against the duke of Savoie.

 

[unmerged(411489)]

Leisner,

Do you have a pre-war save game?

 

[Leisner]

I have an old autosave, at least that is its name .
Though that is some time back, a couple of months, half a year before I declared war.
Will that work?

And, if so, any good surgestions on filehosting?