Wrong obscurity flags on FR230?

Is it possible I have obscurity flags wrongly set on my FR230? I am working on DF app ("Negative Split Pacer") and getting different results on simulation and watch.

BTW I have 5.20 FW on my watch but the latest available to download is 5.07 acc. to:
http://www8.garmin.com/support/download_details.jsp?id=9918
How is that possible?
thx