Question on Dvar Torah for Vayeishev

I had a question on this week's dvar torah. I did not find anyone who speaks about it. In parshas Toldos, (26:6) it says that Yitzchak lived in Gerar which was in Eretz Yisrael. The word used to describe how he lived is " וַיֵּשֶׁב"! How come it wasn't a problem by Yitzchak? The only thing I saw which might be an answer is that all the meforshim explain there that this pasuk is coming to teach us that Yitzchak did what Hashem told him to do which was to live in Gerar and the word "וַיֵּשֶׁב" is not coming to teach us how he lived there. However, the word Hashem uses to tell Yitzchak to live in Gerar is "גור", from "גר"!