I haven't worked on an single fuel torch for a while, what I do remember is that if you are burning your colors you are too close to the torch, back away. Also, if you are melting glass too fast, you are too close. Glass melts pretty slow on a single fuel torch, keep that in mind. I use to try to make it go faster, but the only thing that happens is that you burn the glass.
I'm trying to find a drawing of the flame I had somewhere saved, I'll get back to you.
So you're telling me that I should be patient when melting the glass............

Yeh, I see a problem there.