It is difficult from your description to tell if you have the blight. Here’s a link so you can see if you symptoms match up. http://plantclinic.cornell.edu/FactSheets/leafblight/pachleafblight.htm This was a difficult winter for pachysandra…I’ve heard others with similar problems. The heavy snow cover flattened pachy’s evergreen leaves. Compacted like this pachy will be more susceptible to disease. I’d get in there and rake and rough up the beds as well as removing any bad leaves. I’d go so far as to thin out the bed by ripping out some of the older looking plants. It would be a good idea to lightly sprinkle some plant food over the bed as well. Healthy, well fed plants can ward off disease better than weak anemic plants. I’d use something gentle like Espoma’s Holly-Tone. Lightly broadcast the food and then water it in to get any of the food off the leaves and into the soil. If the problem continues, snip off a coup[le of leaves and bring them to Hewitt’s so they can identify the problem and suggest the exact solution for it.