anexed a province with fort3 and ended up with fort 2

[redborg]

is this not a tad strange.

[yovanna]

When you annex your Fortress level decreases by 1.

[redborg]

i see that.

seems strange

[yovanna]

Well it's because a player could benefit a lot from a higher fortress level. As the game give you a whole new province with already built stuff, it's too much for you to receive a higher fortress level too.