Is this normal. Every pull seems to add a bit more on. Its on the flange area where there is no carbon laid. But leaves residue of resin. Some flakes off but a lot sticks on?

I put release film over the whole mould surface.

just normal bleed out flash
use a filler spreader or perspex scraper too get it off

Or stick some painters tape on there and it should peel off with the tape.