Problems with Printing Consumables

I have been printing SCM consumables from PDFs for the past eight years, usually at our local Staples or Office Max, and had never had a problem with this.  I also print our SCM picture study portfolio prints, copies of the Shakespeare plays from SCM, and occasionally a teacher book.  I have now had issues at both Staples and Office Max during my past 3-4 visits.  The problem appears to be with the understanding of copyright laws.  Each time I have been questioned I have referred the associate to the first page of the PDF where it states that permission is granted to the homeschool family to make copies for the immediate household.  I am then told that the issue is not with me making copies of the material but the problem is that the store is making a profit from the printing of the material.  Has anyone else encountered this problem?

I am at a loss because I use the consumable PDFs for both my boys and that is why I chose the PDFs in the first place.  I have a small printer at home but the expense of ink would be huge if I tried to print the language arts workbooks, Shakespeare plays, portfolio prints, etc.