If you leave the lights in the ON position, they will turn off after about 30 minutes, when the car activates battery saver function.
What you read in the manual is talking about when you leave the lights in the AUTO position. When you leave and lock the car, the lights turn off after 45 seconds.
So it would appear the electronic box the dealership was defective. It was preventing retained power after engine is turned off. That's why your lights were turning off immediately after engine off. You were taking advantage of a defect.
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