These statuses are based on the Template you chose when creating your TeamPulse project. For a description of what these statues mean and when to use them, take a look at the bottom of this page: http://msdn.microsoft.com/en-us/library/ff731576.aspx
If these statuses do not support your workflow very well, you could choose a different template when creating a TeamPulse project. Note: In the project creation wizard by default there are only 2 templates shown, however you can click on a small "more" link to see 4 more templates.
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