We had a production build last night. I am using 2.6.14 version of WyBuild/Automatic updatater.
.NET 2.0 WinForms app.
I had an update prepared to go a week ago. Last night we promoted the updated and it looked like WyUpdate was launching twice, either in sequence or in parallel, hard to tell. Our update package is only ~100kb, so things happen very fast.
After an investigation I realized why - the updater tries to update itself to 2.6.16!
If I look at client.wyc file I see two urls, one i put in, the other I did not - http://wyday.com/files/wyupdate/updates/client.wys