The company that messed up Allegheny County's ballots is also being blamed for delays in sending ballots to voters in other counties in PA and in Ohio. My ballot was mailed before 9/28 and it appeared to be correct. However, a friend of mine received hers later and I guess she may have to vote again.
I've done mail-in voting before without any trouble but this election it has been one massive cluster-*bleep*. Unfortunately, it seems the problems are not human error, but more like deliberate sabotage.