A user pointed out to me that Notes had finally gone round the twist when he showed me a document that had a modifed date that was 6 minutes before the "create" date. I found the problem.

The create date on the document was created as @NOW while the modified date on the

document was computed for display text that just had @Modified as the formula.

When the document was saved and reopened the modified date was set to the server's time at the time that the document was saved. The server's clock was 6 minutes slow and this is what caused the discrepancy. Use the @created (instead of @now) and @modified dates as often as you can and make sure your server is about the same as your company's pc clocks.