Can someone explain all one length!!

Does it mean fallling to the same length on your body or the strand itself. I have a layering problem. could be due to damage though I don't see splits or due to growth speed. But my canopy falls 6 inches shorter on my body than the lower layers but still measures out to be only 2 to three inches shorter in actual length.

I am just trying to know if I am driving my self crazy expecting the canopy on average to ever meet the lower layers ever. That is definately the prettiest but if not natural for me I may be able to just relax and accept it. I wonder constantly becauase if cutting the ends to meet will improve growth I may bite the bullit and do it.