FLAG-GROUP: fmis (controlinfo(6)) should be changed from 3 to 1 when QC2 interpolates, from 0 to 4 when QC2 'tilfordeler' (and original exists). Otherwise the flag values looks correct as far as I can see.
… that useinfo(3) should be changed from 9 to 4 when QC2 interpolates, but that is something which should be taken care of automatically if fmis is correctly set, provided that setting of useinfo is done the same way as in QC1 (is it so?)