It's probably a good idea to start a new thread about books who are pulling nonsense with special teasers (or regular two teamers) involving the Vikings/Eagles game, since letting those stand freerolls the player.
If a book grades it a loss, it could be a simple software mistake where someone entered it a push instead of a void, so give the book a chance to correct their error, but if you contact them and they still insist the bet is a loss if one leg lost already, or you need that leg to win to get a push, post about it here.