Those small mined transactions are your Proof of Stake (PoS) earnings. When the minimum allotted holding period comes (1 day), then you'll start to earn PoS on your wallet holdings that you've held for over 1 day - when that happens the portion of your balance that will be earning PoS will temporarily show up under your 'Staked' balance and will be subtracted from your spendable balance. Once you receive your PoS earnings then that 'Staked' balance gets put back in your spendable balance.
Here's a question that I wasn't sure about - the PoS is written differently than Jackpot coin. Does Supercoin also pay daily PoS interest?
I now have several thousand SUPER accumulated since launch showing in the wallet as "Spendable".
The wallet still shows..
Stake: 0.00 SUPER
How does that number increase?
A very few really small transactions came a few hours ago in as "Mined". Apparently they went into Spendable. Is that staking?
I read post #1 about POS, and googled how staking works, and others are saying that SUPER staking is happening, but I still am not sure how to tell if it's working for me.