OK so here's what I got happening:

Wrote bombing missions for Player A/C as B-17, everything goes as planned until the bomb run.
On the bomb run I signal "Attack" but all my squadron AI's split up and fly around and hit the assigned target (from MB, not from targeting with brackets) long after I've made my run and turned for home. I would like the AI's to stay in box formation and drop when I do, the same way AI level bomber squadrons attack.

Do I need to:

Target area I want hit with brackets (if so then how do you signal "attack" to whole squadron at once as opposed to two at a time?)

Assign the target another way from "attack with bombs" in MB

I realize that the sim was written for fighters and not all scenarios are possible but I'm hoping there is a way around this.