Hi Bill,
Are you talking about the S4future11 field in GLTran? That would only be filled with the appropriate value for Cash Manager for transactions entered through Journal Transactions. Where the checks entered and processed in AP or were they recorded by a journal entry?
If they were processed in AP, then Cash Manager uses the APdoc record. You said the date was correct - did you look at the DocDate in APdoc? You could try and run the CA Integrity Check for that date to see if they then show up in Cash Manager.
Let me know what you find.