Liqbit - You need to learn what a PoW / PoS coin is, and how it works. There is nothing unusual in what you are seeing. You are earning 1.5% a year interest by having coins in your wallet longer than 30 days.
Ok. Thank you. Looks like after reload an rescan all blockchain, balance seems Ok.
Before reload full blockchain in the my wallet was only balance, w/o stake.
I understand in theory ), but was first time in practice and was no any stake in my wallet, only small balance.
So, against the background of some troubles with tagcoin network before, it was a bit unusual. )