What the hell is it that the health APP in iphone6 has a step record one day two months before the activation date?

Another customer service explanation is that the person who helped me activate at that time logged in with his own id and did not clear the record after activation.

This customer service answer is more reliable.

Health application storage is divided into two parts, cloud and local. I activated someone else's id before, downloaded his data healthily and saved it in this machine.