I’m not seeing a temp alert in history last night. Do you mean an alert went off, or that you set one, but it didn’t go off?
The concern I think with the setup I see is that there are RTS sensors averaging into the temp. One reported offline on 3/6/2017 and hasn’t returned. In general the RTS is not yet supported by GC3 firmware, so enabling them and especially using them to average the current temp at this time is not recommended. I would strongly suggest not using the RTS to influence the temp reading of the Tstat at this time.
If you remove the RTS, do you still see this kind of activity?