If you used a multimeter and confirmed it, you should RMA this board. I know it's always the last resort because you will have to disassemble your system and stay without the board for some time, but it's better to solve this.
Have you run it for a awhile to see how it behaves? You could use it like this, since it's just reporting it wrong but working correctly, if the voltages are stable to the cpu.
I've never seen someone with kind of problem before. After reding your post, I tested my board with a few apps, intel xtu, occt, aida64, to see if the voltages were okay. Nothing of the sort happened.
Could you disable everything, auto tuning, asus enhancement, etc, and check if it does the same? Set everything, voltages and such.