Thank you urquhart1244 for your reply.
I have attempted to download the OS from the app store, for which gives me Mac OS 10.9.5 (13F34) which cannot be "cleanly" & I mean cleanly rebuilt, it keeps corrupting (amongst all). And when placed over the top of Mountain Lion does not solve any problems as the issues I am experiencing continue to exist with software that works perfectly utilising the 10.9.0 (13A603) Build.
I do not use time machine & yes I have one backup built with 10.9.0 that works, all the rest have either failed or corrupted up to Sierra (test guinea pig #9 is ready to retire from paying for the privilege of using these tools), for which I have just noticed now becomes an option updating from Mountain Lion. Unfortunately until a stable build is built I may just have to regress to Mountain Lion & slowly migrate away from Apple products & services if they do not "allow" for this option. I have over the last 2 months (yes much time wasted & loss of productivity) rebuilt the system many times with no success to the issues, so whatever is missing between 10.9.0 & 10.9.5 (13F34) is the issue (ascertained and clearly defined) maybe I can just reverse engineer every system I have & create my own.
I'm about to attempt a Snow Leopard build to see if this assists; there is always Linux or Windows if push comes to shove. I was really hoping that the red alert would go off at Apple HQ & that someone would respond back with a click here & solve your problems now; but it appears they just want to keep pushing you onto the "next" thing that may or may not work…