Test suite doesn't run against selected command line adapter

When running a test suite on the screen when it asks what machine (command line adapter) to run against I choose one machine for all the scripts and then click run.

In the test execution console it states that they are running against that machine but when you close and show the results after the test suite is running it shows that other machines (command line adapters) are being used for some tests scripts. Seems to be random.

I've also tried this with scheduling a test suite and assigning a test cell. Same results.

Any clue of why this is happening?