I think I have figured out why it hasn't over heated...there are 2 upper radiator hoses going to the top of the radiator. They're both hot/up to temp. The coolant is presumably flowing in through one and out through the other, mixing with the coolant in the top of the radiator along the way. So it's been getting some cooling.
Plus a bit more from the heater core. Which is probably why I have had no problems driving to work at night...with the heat cranked up because it's still cold.
So #$%^ing glad I found this before the weather got warm.
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