schedule plan preview not showing line types

[Patrick M]

are the schedules not capable of showing symbol line types in the interactive schedule? I'm trying to use objects instead of line types for site elements, so that I can automate my legends; but all I get are solid lines. 
I've tried adjusting schedule scale, view scale, line scaling and size, etc. Is it just not an option? when I open the preview annotate dialog, I see the correct line type, but in the schedule, it's just solid.