I think it is a Reviteristic (read quirky or bizarre) that a Conduit Run Schedule will only see types that are created based on Conduit without Fittings. I'm pretty sure we'd all like schedules to include runs that use Conduit WITH fittings too. I understand that the fittings make it harder to provide a summary of a run but that's kind of the point isn't it, to do the things that are hard for us?
If we follow the help documentation advice to add a shared parameter to conduit and conduit fittings we can create a schedule that summarizes runs via a Multi-Category schedule. Unfortunately the very desirable and important Length parameter dies to us in that context, no joy there.