I didn't change anything via an agent. I used the notes UI to do the changes. And yes, the changes were made to a local replica and replicated. If you look at my site right now I have the original two documents that were created in November that I changed the date on. I have since added two new documents during the past couple of days. Notice how my archive only shows 2 documents for November and nothing for this month. Am I still missing something?

Jack