The 1 getting the message has all 280X's. The 2 not getting the message are 1 of all 270X's, and one of a mix of both. Maybe that will give you a clue to track down the issue. Perhaps it has something to do with hash rates.
The untracked stratum issue seems to be random. I did some tests just restarting my miner multiple times. It seems like 80% of the time, the untracked stratum issues come up and once they appear for that cgminer "session" they never go away. 20% of the time they don't show up and they will not show up ever as long as that session is going and cgminer/cgwatcher will behave in it's normal manner: only reporting real rejects. From this experience, it seems like some kind of sync issue, but pure speculating.
Anyway East server still has the issue, but overall it's running great. I've gone back to 20 intensity and after 3 hrs, 2.5% rejected reported on the site. Will see how it goes after a full 24. Great job Terk!