The CPU version displayed on your server is not accurate, as they are virtual machines, the CPU is emulated to match certain CPU options.
The reason we emulate the CPU is to allow certain features on the cloud, like Hot Migration which allows us to move servers across Nodes without downtime.
The node S65 has Dual Xeon E5 CPUs, and your server is receiving these cores, however, It is displayed as emulated which is why it shows E312XX (which is not a valid CPU)