Bonk,
Rest easy. The first year the ELISA system was rolled out, I was talking to a DNR guy, telling him how many tags I'd bought for an upcoming season. He said, "You can't buy that many!". I said I did and showed them to him. He shrugged and said that they were valid. He said it must have been a glitch in the new software that let me buy so many tags. He went on to say that even if the season dates were misprinted on the license, they will be good during those days.
In your case, I think you are good to go.