I agree with you that it is not intuitive when you have a workflow property on a step.  This happened to me on a DTS package I was given to maintain and was a real pain to find out what was going on.  My solution once I found it was to just put an annotation note next to the step regarding the workflow property.  After that experience, I said to myself that I would probably not use them in the future.  But, after reading this article I may have to rethink that position.  A simple note about a workflow property would let you know to look into the step for the code.  Nice simple article.