Sojourning Under the Sun: Sabbath Surrender (2) (Genesis 48)

Jacob is an elderly man on his death bed.  His favored son Joseph makes it easy for Jacob to bless his grand children by arranging them in their proper place.  Joseph knows that the older is to receive the greater blessing and the younger is to receive the inferior blessing.  Jacob, a supplanter schemer, places his right hand on the younger and his left on the older.  Why does this offend Joseph?  What does this communicate about Jacob’s heart condition?