Even at the risk of sounding, to be crucified:
TUBERS SPLITTING IS NOT POINT
Normal undisturbed procedure, for example, in A.konjac:
1. From a corm 1 or more sheets drive out.
2. During the growing season, the old bulb is offset and (partially) already "composted".
"what scruffy not divided."
3. The sheets / each sheet (in the case of no longer young tubers) saves all new 1 bulb.
4. These tubers have primary Cormels often - usually on slopes.
Special cases, an example:
Extremely short growing season in the open,
or sheet attrition due to accident or illness:
Follow:
The old bulb is not or hardly absorbed, but more or less on geschrumpelt, the new bulb sits up or sideways on the old (rest) bulb. The danger is that the rest is the new bulb with e.g. rot.
Others may complement the special forms of growth with maintained the old Corm. (I have no g.h. and no appropriate place in apartment and Office, pure and rough towing is not quite possible!) (For my garden you are all nothing.)
Now briefly to the actual (confusingly worded) question:
The two leaves were just a sheet. Was this hand - which always - already in the bud ([it was definitely just b] one [/ b] [bud with b] one [/ b] bracts!) the stem is deformed and shared fairly low down in the petiole. As a result it lookedas if there were 2 sheets. This sheet has a tuber saved - logo! Only the petiole scar on the Corm was oval instead of round.
Greeting
Hermann