Digi machine in hgv

I’m confused why last week my drive time showed 65+ hours and I’m sure that that was my second week of driving.I’ve taken my full rest period and when I press the down arrow on a vdo unit after stopping moving my drive for this week is showing 30 hours. Wouldn’t your card re set it self to zero? I’ve only drove 40 mins which is showing on normal drive position card 1 and 30 hours on card 1 second position ?

It doesn’t reset to zero, it’s a rolling two weeks.

End of week 2 you see the total for week 1 and 2

Beginning of week 3 you see the total for week 2

End of week 3 you see total for week 2 and 3.

Beginning of week 4 you see total for week 3.

And so on.

If it reset to zero for the start of week 3 you could then exceed the fortnightly limit for weeks 2 and 3.

The only time it will reset to zero is if you have a week off.

Thank you coffee for information as if I ask any other trucker all I get is Chinese whispers.