Hey Dimps,
My two cents here - Your job title doesn't really make that huge a difference as it is the detailed description that matters really for matching with NOC. I know it for sure because I have held several varying titles but the job duties determine what NOC I apply under.
So I would strongly advise to go with the description and match it with NOC description. Agents pretty much have to work in an "Assembly Line Mode" so they tend to think way too mechanical. The agent I had approached (and the experience pushed me miles away from any agent) suggested me an NOC that would have pretty much killed my chances of any PR