1)
Why does it say both "va'Yichar" and "va'Yich'as"?
1.
Metzudas David: Va'Yichar
1
is in his heart. Va'Yich'as ? he showed his anger.
1
Malbim (from Sotah 35a): "Va'Yichar l'David" ? his face [dried and shriveled] like a Chararah (cake baked on coals).