Honeywell ST6400C programmer Honeywell T6360B1028 Room thermostat fix

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MkLondon

I have a Honeywell 7 Day Electronic 2 Channel Programmer ST6400C programmer and a Honeywell T6360B1028 Room thermostat . My programming is on the on position. I turn my thermostat off. But it turns on after 10 mins . How do I fix this?
 

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