My problem arises in the output part (....). I sent 2000 to my mintpal account in the forms of 10 Naut nad 1990 Naut. For some reason the explorer says I sent about 2090 Naut, 90 MORE than I supposedly sent.
are you sure your not looking at the total in the block?
Well, on the rich list I am number 65 with 90 coins less than my wallet shows I have.
Maybe you didn't wait long enough? IT refreshes every 30min. When i looked around position 65 - there is no wallet with the number of coins you stated.
My guess is that the list is showing the correct amount now.