Oxycons typically put out about 94% at best.
And if you turn them up to 5 out of 5 you can get as low 84% purity.
I suggest you turn you oxycon down to 4 and then ballence your propane against the oxygen until you get good blue cones.
Your green may be getting propane soot or possibly the "reducing flame" { too much propane} is bringing up the cooper in the green glass.
You could find that you have to go to a much smaller flame to get the heat you want to work with, as counter intuitive as that sounds.
ETA: Oh and make sure your oxycon filters are in good shape. With 5 LPM machines you want to make it breath as easy as possible.
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