The default reporting structure for comparing two load tests runs automatically assigns a value to each test run; baseline and comparison.

Currently, this assignment is based on chronologically when the test was run. For example, the first test which was run is always deemed the 'baseline' and the later run is always 'comparison'.

There should be a way to configure your run type, in the situation where the first test that was run is deemed as the comparison and the second is deemed as the baseline.

Please see http://social.msdn.microsoft.com/Forums/en-US/vstswebtest/thread/478ffc5e-2a56-4b44-881c-d408de06a331 for more details.