Unless I'm misunderstanding something, pressing the Exposure Compensation Button alone should have no effect. By default, you have to press the button and turn the Command Dial at the same time to apply or remove compensation.
Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.