There is nothing to ask the devs. It is made clear in the book. Now what people to house rule on, they can, but according to RAW you can spend to consecutive rounds in aiming. ECRB p 209: "Gain Boost on the next combat check. If the character spends two consecutive maneuvers aiming, he gains Boost Boost on the next combat check." If the devs wanted it to be in one round, they would say that. If you spend two maneuvers in a round aiming... But they don't. Not all characters can spend strain, and minions can't take two maneuvers in a round, so they can not use this feature then, unless another NPC gave them a free maneuver to use? (Remember, minions cannot voluntarily suffer strain).
I think it was talked about on a Order 66 podcast, but since I never listen, I'm not sure, or even which episode.
Also if it is my turn, and I aim aim attack, there is no way for me to take damage between the two maneuvers of aiming and the attack, so why even put that part in the book.