That happens on some programs even on Windows. If anything, I'm not sure you shut yours down to often. If you don't, then restart it every time you use it for a couple of days.
The reason I say this is because it's kind of like overworking your brain. If you don't shut it down often, you will miscalculate things and goof up.

Like I said, I no nothing about the MAC's. But I find the Windows programs (besides windows 8 -_-) much easier to use since I've used them for years.
Plus a lot of programs are mainly made for Windows anyhow.
I'm not trying to sound like a prick or nothing, but I wonder if those programs just don't accept the Mac to good.

Another thing you can do if your having that kind of "left click" trouble would be just key-binding. That might or might not work. Try that first.
Other than that, I can't think of anything else to help you with. Best of luck anyhow.

i tried keybinding and the assitstand key bored mouse anything that registers as a left click is a no go even switching left and right clicks dosnt work :(

i dislike this make it always brakes but the annoying thing being this editing software i use iMovie is easy simple and fast and it is the only source of income i have because some people pay me to edit things (since i never get commissions i take money from what jobs i can)if anything i might check to see if my copy of final cut pro that was on muy old mac (thats now so broken apple won't touch it) and see if i can salvage it from it and use that

to be frank i would love a windows computer a lunix computer OR a new mac because i want something i can edit on i wouldn't care if its specs are that of a shoe cubord

also i do shut it off i use a powersavemode that has a full bypass on ALL system settings except rendering on iMovie and a delay while safari is active on youtube since i have horrid sleeping patterns i cannot lay in bed and sleep easily i have to wait until i slip out cold i tried disabling that but it still dosnt register any input of a left click but my track pad works perfectly because i was able to open safari click on the adressbar come here and click on this box to type so it just confuses me i might stop by a apple store but i aint taking this in to them the last time i brought it in they wanted to scrap it and "persuade" me to buy a £3000 mac pro

As I mentioned before it's a software problem. Or maybe you can't left click anything and have to use a different method. I'm not sure about the Imovie thing because I never used it or heard of it before.
Anyways, I've tried but I couldn't guarantee it would work.

If you need any more help on something, note me and I'll do my best.

imagen windows movie maker but sleek thats iMovie

one idea i have been told is to create a new user but sadly on this laptop i don't have the power to d that since i am locked out of it by the disability allowance group :(so i might just move my file onto another computer and start editing on that or use premire pro which is a lot more resource intensive but useable

You could try a video editing software ( like Sony Vegas Pro) and use that, but I'm not sure your allowed to download anything on your PC from the way you put it about your allowance on it.
I hate restrictions on PC's too, I used to own a High School one and let me tell you it sucked the big one. The worst PC I ever owned in my life.