These auto/overdrive Nissan Trannys aren't the best at overdrive I've noticed. When I was in stock form, I would get constant shifting in and out of overdrive on the highway on level ground with no headwinds. I could rarely use it.
I've read that a few people experience that the Frontiers/Xterras overdrive won't work well until they are warmed up. Maybe the newer Pathys are the same? Jim has newer Pathy too, maybe he's noticed something.