The solution is always to submit the uncategorized url to trustedsource.org.
In this case it is the reverse lookup which is determining the category.
The resident database is a smaller database, that is delivered to customers via updates.
The cloud is a database on McAfee servers that contains ALL categorized domains/IPs. The resident database is a subset of the cloud database.
The idea is that if it does not exist in the resident database, then perform a cloud lookup.
That is why you see a discrepency.