In response to:
*****why one of the station keeps turning off its automation at random intervals.****
Check for viruses, backdoors, spyware, trojans and you don't find any, then run hardware test.
Thanks for responding, ran through all the things I could think of and the hardware checks out fine. If necessary I will get a basic install on another computer - enough to stay on air - and redo the drive from scratch.
It may turn out to be a good thing to have the problem as it will make it easier for me to justify getting a different system with functions I consider we need, remote monitor & update, voice tracking, phone links and some other cool stuff.