Font Lab adding nodes when generating ttf


I am a newborn in the world of type design.
I'm using FontLab for the first time to design my own typeface.
When I 'Generate Font' fontlab adds nodes to all my curves. This causes visible waves in my curves when printed large format (tabloid). I have attached two files that I created in Illustrator to demonstrate what I mean, one using glyphs from my ttf file, the other contains the glyphs I drew myself.
How can I avoid this, I see this as a major issue.

Thanks for your help,