Excel 2010 Conditional Formatting Issue with Merged Cells

I'm running into a problem with conditionally formatting merged cells. See my attached example. Of course it works fine without merged cells. With '0' in each cell, the formatting is correct: 0 is displayed aligned in the center of the cell. If I put any other value however, each cell displays its value twice, in the upper and lower right corners. See attached examples if you're unable to reproduce.

Any fix or workaround for this?

Formatting-Example.xlsx