Problem is the feed point is the physical point of feed from the transmission line (end fed). Seems it gets mixed up with the electrical feed that varies all over depending on the physical configuration. If there is no intended other half, the feedline becomes the other half right back to the tuner or the transmitter and its attendant problems. Then there is a rush to block common mode out at the antenna or close to the transmitter. The system has to have a return path back to the transmitter. This should be on the inside of the coax feed line shield. These end feds are often a pain if the system does not solve for the issues it presents. There really should not be any mystery about these if you adhere to antenna theory. Good luck.