Interesting.
ALthough I HATE calling 0870 numbers with a passion as it's open license for companies to keep you holding on the phone and skin you for cash, I called the Friedland customer care number today.
The phone was answered in about 4 rings and after a brief explanation of the problem I was told I was being put through to a "wiring expert" !
Again, told him the problem and before I had finished, he said he knew what the problem was.
Apparently, the SA5 (and alot of other alarms according to him) have ONE of the wired loops set up for "reverse" sensing like my problem. (Ie: Open when closed and closed when open). The reason according to him is for wiring in star pressure pad mats (?!).
He said that all I needed to do was wire two of the doors in series (so effectively they are considered as one door to the SA5, but will provide the correct logic for the contacts).
Impressive customer care service!
Sure enough, all working now except that the garage door is know as the "Kitchen door" and the Kitchen door is know as the "Kitchen Door" aswell.
Sorted!
Thanks all so much for your help/suggestions and input.
Mondriver