Finally found the problem, I think . Early on in the plan and 24x36 layout pages, I was using my 11x17 printer and had set the advanced line weight setting to 1/400 ,in the drawing sheet setup to work with the scale to fit option on my smaller printer ( I was getting huge lines ) . Saved the printer setting and went about my business. I have returned the setting to 1/100 ,I believe that was the original number .Seems to have fixed the problem and layout line weights look good, Will only know after another test page ( have my finger crossed ) .
Hope this helps somebody with an obscure printing issue.