[Norfleet]

Preaching has no adjacency effect, Arryn. Preaching only affects the current province, ever. If you preach in a province where your dominion is already as high as that preacher can get it to go, it has no additional effect unless something attacks your dominion to lower it, in which case the preaching serves as a buffer against having your dominion drop below that point, if you have enough people preaching. You ARE, however, allowed to order the preaching.