Usually they mention the title if there is something wrong with the title. In this case they used the words "listing details - player" which leads me to believe they are taking issue with the fill in the blank portion of the listing where you put the player name. What was in that field?
But if that's all it is, they will allow the buyer to still receive the card. So at worst it just delays delivery a day or so.
EDIT: I found the listing. You put Larry Doyle in the details of the description.
