All hosts are using the same templates.
All items under Application 'Security' is NOT from the same template.**

Steps to reproduce:
'Latest data' with 'Host groups' and 'Application' set, (see attached filtered.png) is what its suppose to look like but with multiple hosts.

Result:
Not all checks are present when displaying multiple hosts. Same application, same hostgroup
(See unfiltered-page1.png)

Checking the next page in 'Latest data' the missing checks are displayed
(see unfiltered-page2.png)

Id guess this is a sorting issue in the PHP code.