Is My HIV 1 & 2 Test Report Conclusive?

Hi
I had my HIV 1&2 TESTS from Agha Khan Uni hospital Pakistan. Test report says its "non reactive" . But it further explains' the test was first performed with ECLIA method which showed reactivity therefore test Repeated on another chemilusence methodology (vitrous ETI instrument of ortho clinical diaganostics ) and result was non reactive'. I am bit concerned why it was positivevin first instance? Is it usual? May b its reactive..plz help. Thanks