This is getting silly. I did check the gcdb, but only after being told my issue is #12.
The fiche-ifc in the corrected paper #12 file is the same as the one in Rolster's old #12 fichescan, so IT IS #12's ifc.
The ifc in the #13 fichescan is different, so that too must be correct even though the indicia & next-issue announcement indicate that it's #12.