try going back through and removing the quotes from your set points on frame references
Code:
BorderT:SetPoint("TOPLEFT", "OptBorderTL", "TOPRIGHT", 0, 0)
BorderT:SetPoint("TOPRIGHT", "OptBorderTR", "TOPLEFT", 0, 0)
to
Code:
BorderT:SetPoint("TOPLEFT", OptBorderTL, "TOPRIGHT", 0, 0)
BorderT:SetPoint("TOPRIGHT", OptBorderTR, "TOPLEFT", 0, 0)