I sent my ACT scores on the 15th but WWU still hasn't gotten them?

<p>I sent my ACT scores on November 15th, standard paper mailing since western washington u. doesn't do it electronically. I sent them on the 15th and I keep getting mail from WWU saying they haven't gotten them yet and I checked my app status and it says they still haven't. I know that since it is sent through mail from Iowa CIty it'll take some time, but how long? Should I be concerned? It's not a huge deal since they're due by January. </p>