I try explain like this,
simply, if I fill FPL (original paper list f.ex.) then Origin and Destination also Alternate are filled at specific own fields, route is then simply route and i don’t expect set there in this case Origin and Destination. That’s all. No problem to check local Country rules or f.ex. EuroControl in this case as me, i expect this is clear.
I’ve been scouring the net on IFR flight planning in the past few days
And where you saw that plans?