Ugh, we had this happen after serving overseas in the military. Apparently even if you keep your state residency and keep voting absentee ballot, our state university likes to claim you are no longer a state resident. We had to call our senator to get it straightened out, we couldn't get the university to fix it without his help. Like you, I wondered how many vets got screwed over on that, and either didn't notice or were just worn down into submission.