ere's all the information. I compiled it into one image for you to make it easier for you. You can see that there are no fills in the paths yet it is treated as if there is when I use the intersect option from the pathfinder. Additionally, The lines that run vertically completely disappear rather than dissecting the lower shape, as it should be doing if it were functioning properly. I did this on two other versions of Illustrator, which I never had an issue with prior to now, and the problem still persists in those versions as well.