That first "good" installation photo shows the coax feed rounted down alongside the lower driven element. From my old Navy ET days*, a normal center fed dipole coax wants to be routed at 90 degrees away from the antenna for as far as possible, otherwise the coax braid (outer conductor) becomes a parasitic element and increases SWR losses.

*Course that was almost 50 years ago and much has changed since then (g).

bumper