Hi Marcel,
generally you should not do anything more, because those two sketches has a simple ON/OFF light inside.
Some more info to help you in the debugging, in the e01_Hello_ESP8266.ino sketch there is a SetAsPeerNode(0xAB02, 1); So you have a static declare of the Peer node (it can also be done at runtime).
In your case, even without connection between your nodes, you will always see two nodes in SoulissApp.
So, your problem is likely a miss communication between the two nodes (nodes communicate independently between them self, but communication with SoulissApp goes always through a Gateway node).
I suggest you to check that both nodes got a proper connection to your WiFi router.
Regards,
Dario.