I just made my first (receiving) transaction with electrum v. 2.6.4. 

From the history tab, right click on the only transaction, click details. I see 2 inner windows: Inputs 1, Outputs 8.

The input address i guess is where the btc i received came from. The output addresses why are they 8? One of them, the second one is marked green and is my receiving address with the correct btc amount i received. The other 7 what are they?  They all have various btc amounts and are unrelated to me.