Hi Kev,
I enjoyed this live song demonstration.
When you record live like this with the amp to the side of you it can be problematic, making it difficult for the vocal to cut through. I think that is what happened here.
Do you always record your demo's in this way? Or do you sometimes record the guitar part first then use headphones to then record your vocal part? I'm asking this because if you do record everything at once in that room for example along with reverb on your vocal it bounces the sound off the walls and can make your vocal sound pitchy. It can make you sing higher than you actually need too because of the room and the reverb your using at the time. So i would try recording the guitar part first on a daw then with headphones on sing and record your vocal. See if this helps you with any pitch issues. It should eliminate them for you.
Also and i don't know if this is happening for anyone else on here but when i click on your youtube clip it will not play for me on firefox. I had to use google chrome so i could watch and hear you.
Johnny