Hello Kris
Have you checked if assigned orders belonging to the same order
network are belong to a different WBS element? which themselves belong to a different projects?
(this is possible)
But orders within one order network should not be assigned to different projects,
You can run report ZZ_CHECK_LEADAUFNR_W_DIFF_WBS to check for these ?
see note 1119593.
(its only an analysis report and the data must be fixed manually)
hope this helps
ger