The "F627R3-R72B" is the Fat Twin. This comes indeed in a single chassis with 4 nodes by default. It is a bit confusing indeed, but the quantities should be divided by 4 to get a per host configuration! I don't see 10GbE listed either, SuperMicro offers several options which are on the HCL.
vwade can you get the doc updated to get the recommended NIC included?