I read somewhere here that a few people have reset their thermostat to
factory settings and it worked. Don't use the phone app, use the actual
thermostat. Just a suggestion! Sounds like since Google took over Nest
things have gone haywire! I hate Goo...
I had a similar problem and I had to clear the temp schedule that nest
automatically sets. Maybe you have conflicting schedules? I too was
going crazy constantly fighting with temp settings, so frustrating! I
just looked at my thermostat to tell you ...