If something is facing up a valley then technically it is facing 'up' even if it is on level ground. Labby Rock definitely faces up a slope. Brennanstown is more difficult to see because the slope is 100m away in the trees, but it's interesting to note that it faces west up the valley, not east as per (more) usual.
I didn't really take much notice of it for a long time, but it suddenly dawned on me at Ballyquin (I think).