I noticed that on a few occasions when I install an app, I find that there is no launch icon placed in the Gnome menus and that the only way I can launch it is from the terminal.

These are mostly apps that aren't installed from the 4 main repositories. A couple were from the /software.opensuse.org site using the one click. Is this normal or do I have a messed up system?

The last one I installed was tpfand which according to the owner's site there should be a launch icon placed in >Sytem>Administration menu.