It appears that that's the jury has found one corrupt persuader but was unable to agree on which one.
This trial schedule is a tacit acknowledgement that the case was far too complex for the jury to understand what was going on,
They've got to make this case clear-cut for the jury and keep them awake and involved. Otherwise, they play right into the defense's hands.
The key for the defense is to put aside the baggage that is Enron, get the jury to see their clients as individuals and show why each of these transactions was business as usual. The longer, the more technical this gets, the more it hurts the government.