[LehighBri]

You could also check in WMC itself whether the recording is flagged "Watched" or not

How do I check that? I tried looking at the properties of the WTV file (nothing) and in WMC itself, but the only thing I see in WMC is that I can resume playback, but it doesn't make it easy for me to see what's watched or not.

Actually, looks like I didn't trigger the recording list refresh on XBMC after making the SetPlayCount() call. You'd think it would automatically refresh the recording list but it doesn't, we have to explicitly rtigger it. And it looks like I missed that part. Dang it. Im assuming if you close XBMC and open it again (or use another client) the watched status should be OK, it's just the client where you performed the action where it isn't being refreshed immediately?

Here's what happens when I say MARK WATCHED (which works fine):
2014/07/14 19:43:49.983 Received client request: MY-PC|GetResumePosition|10977524113473053
2014/07/14 19:43:49.992 Finished request GetResumePosition in 0.01s
2014/07/14 19:43:51.822 Received client request: MY-PC|SetPlayCount|10977524113473053|1
2014/07/14 19:43:51.830 Finished request SetPlayCount in 0.01s
2014/07/14 19:43:51.831 Received client request: MY-PC|SetResumePosition|10977524113473053|0
2014/07/14 19:43:51.838 Finished request SetResumePosition in 0.01s
2014/07/14 19:43:51.840 Received client request: MY-PC|GetRecordings
2014/07/14 19:43:51.852 Finished request GetRecordings in 0.01s

And here's what happens when I say MARK UNWATCHED (which doesn't refresh the UI and requires me to reboot to see the unwatched status):
2014/07/14 19:45:04.022 Received client request: MY-PC|GetResumePosition|10977524113473053
2014/07/14 19:45:04.027 Finished request GetResumePosition in 0.01s
2014/07/14 19:45:05.327 Received client request: MY-PC|SetPlayCount|10977524113473053|0
2014/07/14 19:45:05.333 Finished request SetPlayCount in 0.01s

So in the UNWATCHED example, you're right, it's not calling GetRecordings again after SetPlayCount.

And you're also right... when I close out of XBMC and then open it again, the watched status is correct (meaning, for an item that I just marked unwatched, it is now showing up as unwatched).