When setting your withdraw you can set how much fees you are wiling to pay in order to receive it faster, fees can be from 0% to 10% from the requested amount. Please take a much better look and read information on page.
This is towards your previous miner tools issue:
Understood. Now it is clear.
We will look in to this to improve UX in future.
Thank you for your feedback.
1K Satoshi remained on the balance sheet
How often is withdrawal allowed? This is an additional question.
https://imgur.com/a/FHB4Ll1
check on this image , the 1st bar is the amount of fees u willing to paid
and the 2nd bar to slide the amount u wan to withdraw
hope this help ^^