"Demon Stripes install" ???????

One thing that you need to remember,factory stripes were installed by people. Even when these cars were brand new, there was quite a bit variation on the placement. Jim-Bob might have been great at following the directions and a perfectionist, but Billy-Bob might have sucked and not really cared. As such, even though they used the same stripes, they may have ended up in different locations especially on the lower part of tail panel.