Unfortunately, this means we need to rebuild all Ad-Hoc Funnels from scratch because if you save a report in Ad-Hoc a.k.a. Discover, all of the items remain fixed. This means that you can only add other steps to the funnel if they existed at the time when the project was first created!
New pages are simply not found when you search them on the left-hand side.
This does not make any sense and means a lot of work for us. This issue has bothered us for at least 3 years already.