I think my problem was that I am not using an asymmetric commander at the time. I only wanted an Occupying force.
I added an Asymmetric commander and set him up with a few placement modules and tested that. Just to be clear I have been using the debug option and going around the map checking different areas
I have come to find the following:
IED Module - if linked to Occupying force it dose not place IEDs other than a rare occurrence
- if linked to Asymmetric force I have not seen it place yet but I have not tested it extensively
- if unlinked it places IEDs fine other than some wacky locations, car bombs place, no suicide bombers
Roadblocks - Occupying force, does not place them. It should but it does not.
- Asymmetric force, does place them in the small areas they occupy.