Redemption and Our Forefather Jacob

After mentioning various curses for failing to perform G-d’s laws, the Torah says that at the end of time, G-d will bring an end to the Jewish people's exile by remembering the Patriarchs: “And I will remember my covenant with Jacob, and my covenant with Isaac, and also my covenant with Abraham I will remember….” (Leviticus 26:42) Why are the patriarchs listed in reverse chronological order? And why is the name Jacob (Yaakov) spelled yud-ayin-kuf-vav-vet with an extra vav, when it is always spelled yud-ayin-kuf-vet without a vav?