Department is such a critical piece of information to be correct. Visibility is a big thing especially when department can be auto-populated from other sources. We are finding the wrong department is easy to mess up or overlook.
Please move Department to the General tab so that it is right there in your face instead of in the additional info tab. Department should be part of that information collected on the initial call as it dictates so much of the billing and processes. (i.e. Warranty, Maintenance, COD, etc).