There is a part in the third bracha in bentching which goes like this:
הרחמן הוא יברך את אבי מורי בעל הבית הזה ואת אמי מורתי בעלת הבית הזה אותם ואת ביתם ואת זרעם ואת כל אשר להם אותנו ואת כל אשר לנו
May the Merciful One bless my father, my teacher, the mast of this house, and my mother, my teacher, the mistress of this house; them, their household, their children, and all that is theirs; us, and all that is ours.
(From the Kehot Annotated Bentcher)
I have seen in other bentchers (for example, ArtScroll) where they have this part they seperate it off and include instructions about when you're in your own home, or when you're just alone, or when you're at a friend's home, and the above text is only said when you're in your parents' home.
But in the Nusach Ari bentcher, the one I quoted from Kehot, there are not alternate instructions. The text that is usually deemed "for when you're in your parents' home" is just put in the text of the bracha as if it is supposed to be said every time you bentch!
Is this section supposed to be said every time, even when you're not in your parents' home? Or is this just a big oversight on Kehot's part? (I must note it's like this in their siddur too.)
Additionally, if it is just a big oversight, when you're bentching, when you just skip this part, what should you say instead according to the Chabad nusach?