Is there a way to avoid having sharp edges (Kayak edges) after you join two surfaces created using network?

 From:  Psygorn (DRILLBIT)
9881.7 In reply to 9881.4 
Hello and thanks for your reply Ed(EDDYF) and sorry for my late reply,
by "kayak" I meant sharp edges if you find the attached images in my reply for Phiro you can see my question in pictures. :-)

And thanks for your informative reply :-)