It looks like there are two points very close together, one was picked up as a line-point and for some reason the other wasn't. Can you please turn on regular points and then send another screenshot of your "detailed view"? Thanks
As a side note, there is a "topology" threshold for line-points. By default, the line-cracking tolerance is set to 100cm. This can be changed using a registry key, please also let me know if this gap is larger than 100cm.
Thanks,
Chris