Hey thoddiver,
Your comment was accidentally moderated, so I'm posting back to this thread your initial resolution recommendation:
Got an answer from the support desk, here's my ticket number: 416554.
Solution was this:
Sometimes the jobs get stuck in the SQL DB.
Step 1: Log into the server NCM is installed
Step 2: open Database Manager
Step 3: log into the SQL server being used by NCM
Step 4: Scroll till you can find "TransferQueue" (It's below Tags, above TrapActions)
Step 5: Right click it and select from the drop down Query Table
Step 6: At the top select "Execute query" if it didn't auto populate.
Step 7: all your base are belong to us
Step 8: You should see something that says "SELECT TOP 1000 * FROM [dbo] . [TransferQueue]
You should see in the results all the jobs currently running, and you should see the "stuck in cancelling"
Step 9: replace that sentance in the script area with:
delete from [TransferQueue]
Step 10: Click Execute query
Step 11: Check NCM Config management transfer status and confirm they are gone
Step 12: Chuckle
So that worked for me, hopefully it will for you!