Hi James,
In more recent versions of QuickBooks, intuit added a notes table allowing users to create multiple notes for an entity. Unfortunately, they have not yet included this table in the QBSDK and as such, we are unable to sync with these additional notes.
The first note for each entity can still be seen in the Note field on the Entity table. We do sync with this field and it can be seen from the Edit Customer screen by selecting More Actions… > Notes. Any additional notes cannot be seen in Method, as they are not available to sync with. Sorry for the inconvenience.
-Audisho