Career Ed Lounge is embedded in over eighty professional development portals serving the career and technical education community. Performance Groups in the Lounge are integrated with related learning opportunities offered on these portals. With a few exceptions, Performance Groups are also publicly available to any member of the Lounge to maximize peer-to-peer learning and performance outcomes.
Here's how I interpreted it:
Soft skills = people skills + workplace behaviors
People skills and workplace behaviors do overlap some, but I think "people skills" refers to interactions with others whereas "workplace behaviors" refers more to dependability, common sense, positive attitude, and other (non-technical) personal attributes in the workplace. And I agree that many of these "workplace behaviors" affect "people skills" so the distinction is not always clear or even relevant.