They may be going to overhead accounts.  Depends on how you have the MISC item setup.  I use some WO's to capture labor but I have them posting to indirect labor account.  Also, what type of WO are you setting up for the misc?  I use an "I" when setting up misc or indirect items.

The main advantage of using an "I" type work order, and it's a big one for me, is that the work order is not included in the WIP summary report JC-M.  This means that I can get a meaningful total of what is in the WIP GL account; since the I type work orders are expensed and not captured in WIP, when they are included in the WIP summary the WIP total is over-stated.
We use the GL and so the class code of the "I" type part number specifies where the labor is captured.  However, I just ran the AI-C report which I presume you use and the labor issues are all lumped together in that report.  I guess if I was not using the GL I would be exporting this report to excel and sorting by part number, or creating a report in Access/Crystal Reports.
I don't think anything will include the "N" type part number on the IN-N-A report. They have no "inventory" value since they presumably have been expensed.  I may be wrong about this though!

Yes I can see transactions in Issues for these part number Work orders, but in WO receipts the value is $0.