RAID 1 not recognized in OS after BIOS update

Hi,
First off I am running Win 7 on a primary SSD, and have 2 1TB HDD in RAID 1 for storage. I have been running this setup fine for a while now.
I recently updated my BIOS (P8P67) using the EZ Flash utility from USB per the following steps:
-Restore defaults
-Flash new BIOS
-Restore defaults
-Reset SATA mode to RAID

Everything went fine, and I verified that my BIOS was seeing the 2 HDD as 1 volume. The Intel RAID controller shows the mirrored volume and 2 drives on bootup, all fine. However, when I get into windows, the RAID volume is not listed in the Intel RST software, device manager or disk management.

I got confusion.

Fixed.

After going online to Intel and checking that I had the latest drivers for the SATA controller, I decided to check the ASUS website. I downloaded and installed the older driver they had listed there, and during installation it picked up the volume and now all is good. I doubt it had anything to do with the driver version though. I think if I had tried just reinstalling the newest ones the same thing would have happened. Anyone know why I had to reinstall in order for the volume to be picked up?

I still have a fairly severe case of confusion...