EU cars delivered on day one (like September 2013) have been able to charge 32A single phase when equipped with single charger. How? By using the blue UMC adapter. That blue adapter simply bridges the three phase pins of the UMC to the L pin on the blue adapter. Check the wiki
here
Some French guy actually achieved 63A single phase (dual chargers), it's on these forums somewhere in the French section.
Being able to charge 32A single phase does not mean the car has dual chargers.
This is expected, since 1x32A on single charger equipped car will only work when the phase pins are bridged, so either create your own type2 cable/charger that can do this (like the French guy did, do not try this if you don't know what you're doing) or use the UMC with the blue adapter.