Why does this transaction results in only 2 unspent output (and no spent output)? This transaction is from one of the latest block. However I don't understand why it seems to be just dividing a single transaction without being spent and transferred to someone else.
I don't understand why it seems to be just dividing a single
  transaction without being spent and transferred to someone else


Only Unspent tx i.e UTXO could be spent, and here in your case this  tx is UTXO which after spending to addresses

13MDsVCs3AvSxZxjWUwty2gthPAXkYf6wb - (Unspent) 0.00928291 BTC
1CPp812W35rarR45CS6EYxdC4JazR4H9Wn - (Spent) 0.00231133 BTC


now becomes spent tx


  Why does this transaction results in only 2 unspent output (and no
  spent output)?


This is because lets say this is  your address: 1CPp812W35rarR45CS6EYxdC4JazR4H9Wn where you want 0.00231133 btc, so its one of the output address.
So after sending 0.00231133 to your address leftover balance i.e 0.00928291 need to be stored some where so in that case  13MDsVCs3AvSxZxjWUwty2gthPAXkYf6wb becomes your change address where remaning btc left after spending utxo is sent. Thats why you have 2 unspent op