Perhaps you will be interested to see the 1.1.05 update to
"First Discovered tag - misleading name and buggy" thread. If you like some role-playing about it see also
here
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HOTTEST CLASS IV GAS GIANT - HIP 64296 A 1 WITH A TEMPERATURE OF 1,417 K
HIGH METAL CONTENT PLANET WITH LOWEST METAL CONTENT - HIP 68398 2 WITH 28%
SMALLEST TERRAFORMABLE ROCKY PLANET - HIP 66450 A 4 A WITH A RADIUS OF 3047 KM
LIGHTEST TERRAFORMABLE ROCKY PLANET - HIP 66450 A 4 A WITH 0.0921 EARTH MASSES
A curiosity: a molten rocky ice planet as a terraformable water world (I wonder whether or not there are terraformable rocky ice planets that aren't water worlds)
Edit:
But my point is it should be a general rule that an evidence should be clear - such unclear descriptions are currently not only in case of C-type but some others: eg. unclear description of at least one type of white dwarfs (DC, IIRC) and at least one type of giants (M-type, IIRC).