Herman - I only check the board sporadically and don't see attachments. But I've duplicated what I think you are seeing on real-time data that I have, and need a little while before I can look at it. At first blush, it looks to be related to single precision and small changes at small time intervals. We'll either find a workaround, or I'll post something that I had planned to in a while anyway that addresses the general case problem of implementing variable periods for any function.
-- BruceR
