A) There are a number of interpretations of the Torah that are monolatric, rather than monotheistic. The ancient Hebrews probably acknowledged that other gods exist, but that they are both weaker and less righteous than God. At some points, they may have been actually polytheistic, though the God of Abraham was considered the chief of the pantheon.
B)The non-personhood of the Presence is pretty similar to the Kabbalistic concept of Ein Soph, the limitless divine origin of the Tree of Life (of which our material existence is the least emanation). Ein Soph is never personified, because that would imply a lack of divine unity (the attribute of Keter, where everything is one within God). God is sometimes personified within the Torah, but most Rabbis understand the Torah as instructional metaphor first and history second.