Peace Treaties and Control of Regions

[kenh000]

I am playing a game as the Hiberni. I have all of Ireland and have also conquered a few independent regions on the west coast of Britain as well. At some point, the Picts declared war on me and attacked. I won every battle against them and had conquered a few of their regions. They were in the process of besieging one of my regions but it was holding out and I was moving a large army to put a stop to the siege when they offered peace.

The only clause of the treaty listed was an offer of 500 gold to end the war. I thought this was appropriate since I has been beating them and I had no desire to continue expanding at this point so I accepted the treaty. However, when the treaty went into effect, all the regions that I had conquered reverted back to control by the Picts even though I still had armies in the regions. I would not have accepted the treaty if I knew I would lose the regions. Is returning regions normal? Did I need to click somewhere else to see the 'fine details' of returning conquered regions as part of the treaty?

[Surt]

If you don't demand their regions in the peace deal you will revert to them.