Is my new Fairphone 2 second hand?

I’ve received my new FP2 a few days ago but I got this message on the screen:
Your Fairphone with you for -1 year, 11 month, 22 days.
And every day it adds one day. Does anyone know what does this mean? It sounds to me as if my FP2 was already 2 years old!
But, misteriously, after posting a question on customers service it has automathically changed and now says it’s only been with me for 24 hours but I’ve had no answer from customers service.
Does anyone understand this?

It’s an issue some FP2s have:

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