Jacob Senses Joseph
[12:68] When they went (to Joseph), they entered in accordance with their father’s instructions. Although this could not change anything decreed by GOD, Jacob had a private reason for asking them to do this. For he possessed certain knowledge that we taught him, but most people do not know.
Why did Jacob ask them to enter through separate doors?
Maybe because if it is a trap they will be looking for a group of eleven, but if they enter through separate doors they can get in under the radar.
God tells us that Jacob had a private reason for asking this so we shouldn’t extrapolate to make assumptions
[3:66] You have argued about things you knew; why do you argue about things you do not know? GOD knows, while you do not know.