Thank you for asking this question and allow me to answer it this way.
The temperatures are all target temperatures and the eco temps is 75 degrees +/- 10 degrees. My understanding is that the temperatures are for the eco is going to be lower than the warm temperatures. I would be nice to have a target temperature chart but I believe there are too many variables. Building shapes and water pipe runs from the water heater to the washers are just one of the concerns for water temperature at the faucet. I will pass along to the factory your concern for the temperature chart posted to the owners manual.
I hope this answer is useful and that it helps you correct the problem with your appliance.
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