  In this note we improve our upper bound given earlier by showing that every
9-fold covering of a point set in the space by finitely many translates of an
octant decomposes into two coverings, and our lower bound by a construction for
a 4-fold covering that does not decompose into two coverings. The same bounds
also hold for coverings of points in $\R^2$ by finitely many homothets or
translates of a triangle. We also prove that certain dynamic interval coloring
problems are equivalent to the above question.
