Don't forget that this tool is in Beta and is therefore still being worked on. It is to be expected that there might be bugs that need ironing out before the finished product is released. Microsoft does a good job of testing, but there is a limit to what it can do with the machines in their own labs. They are able to get the product/tool into a sufficiently stable enough state to release to the wider community across the world and, from the feedback they receive on bugs and other issues (including interface layout), they are able to incorporate fixes. Ultimately, the final release of the tool will be a collaboration between MS and the members of the worldwide computing community who have chosen to participate (and provide feedback) in the Beta testing phase.