Sort Handler not sorting as expected

Issue Summary

The sort handler seems to choose its own sorting algorithm and completely ignores whatever I return. As a test case I did the following:

1. Create a view
2. Create a PHP sort handler
3. In the sort code simply enter: return 1;
4. Check the results
5. Edit the sort code so that it is now: return -1;
6. Check the results

Expected result: 6 should be in reverse order from 4.
Actual result: 4 = 6

Nothing I put into the 'sort code' seems to have any effect on the output but removing the handler results in a different sort order.