After a fresh install of icinga 1.8 and icinga web i've added a few hosts/services and restarted the icinga service. Next i cleared the cache in icinga web through the web interface by clicking on admin at the top of the screen and clear cache. then reloaded the icinga-web interface and the newly added host/services were not displayed.
The icinga logs do not show any issues, i've also run /etc/init.d/icinga showerrors and no errors or warnings displayed.
Searched everywhere for a solution and read all the documentation from icinga but haven't found any references to this issue anywhere.