Ok. I have a QT rack, it is two 20" strips of 4" flex watt wired in parallel. I added a second QT rack underneath. It is also wired with 20" strips of 4" flex watt. This one is NOT wired in parallel. Each strip is wired separately. All three plugs are plugged directly into a thermostat. My bottom shelf is running 92, and the top two are 95 and 96. The bottom one can be a bit off due to it being on the floor and being cooler. The 2nd shelf up concerns me. It is running at 88. What the heck is going on? All same length, size and wattage. IF anything I thought the two wired together would be cooler. Its not the plug in on the thermostat, because i have switched them all around and get the same results. I re crimped the connectors so I don't think its a bad connection. Could it be the power cord? what the heck is going on?