Hi All - we are in New Zealand until the 29th - please forgive the delays in my responding.
flgrb50 - I had a look at the pictures and based on those I think I see what happened. The first picture of the front bracket looks like it has been bent in a way that moved the top vertical face further back. This would create an alignment issue. I do not have access to put van or my computer to get better pictures but have red lined your pic to give you an idea of what I am seeing.
The horizontal face coming off the B pillar is not flat, it has a curve. The next bend going to the vertical with the hole is bent far to much and slants back instead of being more straight up and down. These are combining to shift the tall vertical awning mounting tab inwards towards the van. Hope that makes sense.