Gee Stretch, I looked this up on CBS News (link below). So applying the existing safeguards, Lancaster officials flagged a bunch of voter REGISTRATION forms that looked odd and MIGHT be fraudulent. They are tracking down the alleged registrants. Culprit appears to canvassers parked outside stores, etc. I ran into one just the other day.
My $5 sez that since the citizens contacted all seem to have interacted with canvassers, the canvassers probably filled out forms that were incomplete and submitted them. Wrong, yes. Stupid if correct, yes. Fraud? Not so much.
Bottom line? NO VOTER FRAUD. Possible/probable ineligible registration applications. Probably a bunch of Trumpers who couldn't fill out a form correctly if it was their grocery list.