@StephanSamuel thanks for the answer. I had no clue what the LEFT_FID and RIGHT_FID represented and didn't think the tool documentation would be so detailed. A regular join worked fine since my line is one continuous line and thus only one record in the attribute table. I imagine a spatial join would work as well.

yeah. I don't see any change. Some of them are ok but then others are literally right on top of the boundary line

thanks for the suggestions John. While your solutions don't specifically solve the issue I'm having, they are workarounds and are much appreciated. Thanks for your help!