I did look through that article last night actually. I didn't see anything that I wasn't doing correctly based on the instructions.

I'd just like to point out one more thing. There is another forum post http://www.sqlservercentral.com/Forums/Topic961716-1549-1.aspx which points to another error on a different part of the setup. This is at the Cluster Disk Selection screen. I am also seeing this for the root disk that the mount points are connecting to (Disk 35). I am assuming the issues I'm experiencing here and at the section where you specify the data paths described above are related.

I'm going to give it another try this morning, then call Microsoft. If I get the answer from them I'll make sure to follow up here with what they say.