Thanks for the help
So it turns out that the blade is adjustable! I have adjusted it so its barely out of the tip of the holder as you said but still getting mixed results, I do wonder if the design is just way too detailed.
Another odd issue though, its almost as though the pressure changes from the left to right... So any design i align to the left side of the plotter cuts ok, the further to the right I go the worse it gets and the more destructive it seems to get.
Edit: to further add to that, I am noticing on some of them it seems to completely miss a certain cut, again its irregular.. some it cuts, some it doesn't.