Striped line down middle of lines - how get rid of?
Hello:
I have lines which have a striped line down the middle. The line was originally green and I changed it to a gray. Now the gray line (not a rectangle or any other shape) has a green center.
I am all for ideas like finding a cream center in confections, but any time I use the pen tool to extend these lines, the green-within-gray-line is added, not just the gray I selected.
I tried to isolate it and change the opacity and other trick to minimize the effect, but I just need to rip it out somehow.

Any ideas as to what is going on with these lines?
Any ideas as to how to correct without just deleting all such affected lines and redrawing?
Thank you!
