1,475.97 - 816.00 = 659.97

I don't understand why Edward White would recognize the accounting entanglement 1,475.97 - 816.00 = 659.97 on April 22, 1992, but be confused about it on May 19, 1992; why he listed a "Debt from Harold O'Connell Trust   659.97" in an exclosure to his letter to trusting Jean Nader on April 22, 1992, before asking me what the numbers meant on May 19, 1992:

1992.04.22 (Edward White to innocent Jean Nader, enclosure, in part)
"Debt from Harold O'Connell Trust   659.97" 

1992.05.19   (Edward White to Anthony O'Connell, in part)
"2. The K-1 filed by the Trust showed a payment of $816.00 in interest to the estate. You sent a check in the amount of $1475.97 to the estate. What was the remaining $659.97? Do I have this confused with the tax debt/credit situation which ran from the Third Accounting?"