So it's worth noting that Main St south of Swan is not on the state highway system and according to
NJDOT's Straight Line Diagrams both directions of NJ 29 actually follow the road that NJ 165 street sign blade is on... which is exactly how it is mapped in the HB.
NJ 165 does also officially exist on that segment of road per the same documentation, which is presumably how it ended up on that street sign blade, but it's entirely concurrent with NJ 29 and thus there's really nothing to map.
I would vote no build on this and shrug it off as DOT stupidity.