Ammount paid is much less then shown on pending

Greetings,
Just wants to understand why such a discrepancy on amount shown on pending this month (was about 20k Bat) and actually transferred to uphold wallet (just below 4k).
Noticed every month not all the full balance has been transferred, always have some little balance yet to be which I assumed it could be from the last days between calculations and actually payment. However the pending balanced left this month is much far more then the usual.

Thanks very much