Today I was following Heathenx tutorial Episode 097 Path along path.
When I tried to follow the exact, in first attempt the solid colors turned like Plastic pipe or should I say Soft drink straw. In second attempt again it was similar like first attempt but this time one color bleed like a leak ink.
I stopped doing work because I do not know if, it due to BUG

I am a kind of new here therefore, could not add image.
Any advice or suggestion will be helpful.