Hi Allen! Welcome to the Forum!
That seems awfully weird! Could you also post the resultant PDF?
A Couple other things to try sorting out:
1) seperate the layering, so that the lines would be (say layer2) hidden
2) Is the PDF construction done with the new 3D Adobe?
3) If Adobe is 'interrupting' the print flow, make sure it is printing according to their (Huge) parameters setups
4) Because of #3, I have "fired" Adobe for doing anything in the printing, utilizing the Preview app only