Actually read an interesting piece in the Harvard Business Review about this exact problem. They found that automated filters miss about 25% of qualified candidates because people use different words for the same skills. I have a buddy who runs a small design studio in Portland and he told me he stopped using filters entirely for creative roles. He said the software kept passing over people with really strong portfolios just because they didn't use the right industry buzzwords. Sounds like you found yourself in the same trap with that Photoshop vs Creative Suite thing. Might be worth doing a quick manual scan next time, at least for the first 50 or so resumes to see what the tool is actually catching.