1)
Verse 13 already discussed a Tzadik who soured. Why is this repeated?
1.
Malbim: This teaches that logic teaches the opposite of people's way. When a Tzadik changes and sins, he dies both for his sin and his prior virtue. The more virtuous that he was, this increases his sin now 1 .
2)
What is the meaning of "u'Mes Bahem"?
1.
Rashi: He will be punished for them.