Series 1 OTS A-post chrome trim issue

I had a new windscreen installed with a rubber seal from SNG. Supposedly it was made by COH Baines in the UK. I cannot get the A-post chrome trim pieces into the proper groove in the seal. The trim doesn’t seem to be wide enough to reach the groove. I have the same problem with both an original and a reproduction chrome piece. Anyone experience this problem?
My car is a 64 3.8 roadster.

You may want to put up a couple of pics of the problem.
People here like pics…