Create a variety of events with different 'Source Location' values, such as host names. View the resource list. Sort by 'Source Location'; for example if you want to see by host these events. The entries are not sorted by the value of the column, but likely something like an associated primary key value, which has no UI meaning. See also Bug 846375
Created attachment 870487 [details] screenshots of UI and db table dump I was not able to reproduce this issue. I've created multiple event sources with different source locations. However, it was sorted correctly in the UI (lexicographically) not by ID. Screenshots of screens and rhq_event_source table dump are attached.