I think you already answered your own question: The The earliest Lego television production is Edward and Friends from 1987 that showcased the Fabuland theme.
From the Wikipedia page:
It was Lego's first foray into animation and television in general.
I think this is just basically something they did on purpose. I would suggest that you check more like this to confirm your suspicions, but as far as I am concerned, different countries maybe have different styles of doing things related to counting.