How to prevent calibre add a blank line at every

First of all, I am dyslectic in a special way, I think and read in pictures, translate it into a plane question is difficult ( but reading is very fast :p )

I use calibre for epub-epub conversions, insert a font into the book ( amasis).
But at normal conversion calibre add a blank line at every <p> or <p class=... line in the epub.
But when I remove it using the option in the look and feel section of the conversion, in the part next under metadata ( remove whitespaces between alinea's ) it also removes the white lines at a scene change.
So there isn't a white line at all.
How do I prevent calibre adding a white line at conversion at every paragraph, if it didn't do it I could leave the option to remove them unused/unselected.
The conversion is ok, the amasis font is inserted and all original fonts are changed into the amasis font, but with every conversion an extra blank line is added when there is an <p> or <p class whatever > in the epub, and tick the option to remove every blank line, it does remove the extra added line, but also the blank lines that supposed to be in the epub.

I hope this is still clear for u now, I just don't want that calibre adds the blank line at every <p> or <p class whatever> otherwise it would work very fine, can anyone help me ?