Cooling issue, but this time it's to cold...

Ok guys, I'm going to give you the info, do what you want with it, I cannot explain it...
So the whole time I had this engine from break-in, it's never overheated, it got hot enough to open the verified accurate thermostat but, my new Sunpro gauge was reading that it was only around 120 degrees, sometimes up to 150 degrees if I got on it or had it idling for a while. So if you read thru the thread again you'll see the issues here. I had thought that because I verified two different thermostats that the gauge had to be off, but I wasn't getting enough heat in a couple cold mornings to have hot air coming from the heater, it would get warm at a stoplight but soon as I started driving the gauge would drop to bottomed out at 100 degrees and I would lose any heat coming from the heater. Wierd right???
Today I did the install on the Champion three core radiator and contour electric fans. I don't have the controller yet so I hard wired them to the battery to test them. I started the engine, had the cap of the radiator and waited till the thermostat opened then turned on the fans. I ran the car for about a half hour varying the throttle trying to see if it was going to get to hot. It went to 180-185 and never varied from that. Go figure, same gauge, same thermostat, it went to proper temp and never budged.......