Thank you ConradPark & WalletMan for you're replies, greatly appreciated.
The Leather I'm using is very thin, I don't know the right term for it but I think it's pre treated. No colouring or wax finished required.
I do think I'm trying to be perfect with it, with no margin of error. Fault of my previous job were everything had to be perfect with no margin for error.
On the tool side I've brought a straight blade knife just this morning, as I think all the safety features on rotary blade might be getting in the way.
I will implement the suggestions you have both made for which I'm thankful allowing me too get over this slight stumble.
Cheers