I see in your screen shot that the chart is showing that a total of 0 tests contained in the test list passed, and 1 test in the test list failed. How many tests were in your test list, just one? If true then the display is correct. I see in the right pane that your one test ran a total of 6 iterations, some passed and some failed (interations 1, 2, 5, 6 passed while iterations 3, 4 failed). Test Studio is correctly reporting that the test, as a whole, failed because at least one iteration contained in it failed.
Does this answer your question or am I misunderstanding what you're asking?