How is the report populated?

On "metrics - generate report", it is not clear to Fiona (and me) where each field comes from and what the report means. Furthermore, we notices that there are all 0 and one 1 (at Finance Administrator) for the number of people broken down by job title, suggesting that the system fails to retrieve information for other people than the person logged in.

This comes down to the missing help text and explanations in the forms in Labjam. I understand that you want to keep the amount of information on each page low to not overwhelm the user. Instead of the always-on helptexts that we have in Drupal, what do you think of adding tool tips (explanatory boxes that pop up when the mouse comes close to the respective input field)?