Connect curves

How is everyone today?  I am having a challenge and I hope I can receive some help.  I'm using CorelDraw X8 to draw artistic patterns for plasma cutting.  when I draw an arch the end nodes connect and convert the single line into a connected curve.  I would like to to have a single curved line that isn't connected.  Is there a setting I've missed? thank you.

For a little further information,  I draw in wireframe mode and I only see the connected curve when I switch the view of drawing to enhanced.  

For a visual image, imagine a " C " I want to cut the C in one line.  In wire frame mode it looks like a C, when I view in enhanced mode the beginning and end of the C is connected.