If DE is Delaware and if I am an Geography Bee , You are living at Atlantic Coast and some places have very high humidity.
If the markings have same exposure , I think paper printed its ink on to your film. What is your camera by the way ?
I wish you the best luck ,changing your film and supplier would change everthing.
Quite possibly humidity. They were stored in the fridge until we moved and haven't been put back in. I'm thinking moisture caused the ink to transfer onto the emulsion.