Dear Brie,
The verb "looks" is ambiguous between v|look-3S and cop|look-3S. In this case, the current version of MOR made the wrong choice. However, we now have added a facility to MOR that uses the prepost.cut file to make a better choice. The relevant rule chooses the verb listing before a preposition. So, the most current version of MOR will get this right.
More generally, tagging for part of speech in English will always make a few errors. Our goal is to continually reduce the error rate and the prepost.cut facility helps in that regard.
--Brian MacWhinney