Are the projects being copied from projects where these people were? In this case, the people are being copied over as well. Were the people once part of the project (assigned to tasks) and then reassigned elsewhere? In this case, the people were not removed from the tab when they were removed from the task. Are you creating these projects from a template? In this case, the template may have been created from a project that contained these people. In all these cases, the problem is that the people or staffing tab isn't as visible as it should be, doesn't behave in an ideal manner, and the training doesn't really warn hard enough about checking the tab. This is a common question that comes up as a result and Project Owners definitely should be trained if you are planning to filter on projects that people are on. Hopefully you'll find your answer in one of these scenarios! If not, check back in with us here :) -skye