Plots on one computer are printing out differently than others

One computer out of about ten seems to be printing out plots differently.  When everyone else prints out their plots, the text is red and the cyan outlines around the drawings are very bold.  When the problematic user prints, the text is magenta and the cyan outlines are very light.  This only started happening when we upgraded to AutoCAD 2015 from AutoCAD 2012.  After the update, we imported the same settings file onto everyone's computer, so everyone should be setup the exact same.  Not really sure what is going on here.

Here is what a correct plot looks like:

Here is what the problem plots look like:

Any suggestions would be greatly appreciated.