i realized, that my blacknetamount is shrinkin....
For each new burn, we shrink balance of all accounts, so that the sum stays 1 000 000 000
also realised that 2 diffrent transactions to the burning with a amount of 10 blk each that show in my walletst ransactionlist as to diffrent transactions of 10 blk each are found in the blockexplorer as one transaction of 500 blk and 480 back to my wallet...
https://en.bitcoin.it/wiki/Change