The Sinestro Corps and Green Lantern Corps briefings are two entirely separate briefings. I have #5 in Sinestro Crops. I believe I am missing #1 in Rage War and #3 in Sinestro. As far as I know, no one has found these on Hero side. I'm 99% certain we didn't miss any in Alt. Metro because I popped a radar for collections and never found a node for anything other than collections. They've got to be in the ops and I'm just not hearing them.