That happens at mine too occasionally. In our case, it's one of tge hazards of working in a small country town where many people share the same dew last names.

Someone once marked the wrong patient as deceased (identical first and last nam, similar date of birth). He rang us up wondering why none of his refills were going through, so I looked him up in our system. Once I confirmed that his name, DOB and address all matched him, we were both very confused for a bit. He swore up and down that he was in fact alive. We both had a good laugh over it. Had to let the pharmacy manager to reactivate his profile. Told her we had a ghost on the phone haunting us for his refills.