The best way I've found to add o-lets to a piping route involves mating the axis of the o-let to the sketch line of the route. However, when I set sketch entites to visible from the top toolbar, it only shows me parts of the route sketch. If I start a fresh new route assembly, my method works just fine, but for some reason with this assembly, it is not working properly. Anyone know what might be going on?

See attached for illustration of problem.