I took your advice and tried a fresh full install. Still can't see what my problem is there are so many settings to compare. I tried adding products as I had and lo and behold they work correctly in this set-up. I've obviously got a setting wrong or one of the add-ons I've installed has corrupted something. I may be as well now continuing with this install rather than wasting more time troubleshooting.
Thanks for help.
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