You may have done nothing wrong. I think they are just scatterd out. I have not been graphing any stacks or schools lately. It seem to be hit and miss. I went all night last night and picked up two slabs catfish and some blues. I went up up river a lil ways then went over to marina. Did you try different depts ? Jigs, minnows, jigs tipped with minnows? You try other spots or just one? I caught one slab on slip bobber and hook and other on 1/32 oz jig with blue white skirt tipped with minnow. So that tells me they hiting both jus need to find more. I worked both area real good after bites but nothing after both slabs.