Good call, Khalil! I'd want to know all that and not be reeling from the first attack while trying to figure it out!
Again, I'm kind of new and inexperienced. I know that I allow my uke to "re-post" all the time because I'm doing the technique so slowly. ("OK, this foot is here, I move the arm there, trap, then, um, finish the turn -- oh yeah, sink. And lead with the hips...") Also true that when equally inexperienced classmates are working me there are plenty of points where I could get my balance back. If I don't get unbalanced much at all, I just brace and stop moving, and the technique fails.
But when sensei or the senior student work a technique, I'm off balance almost immediately and I never get a chance to get it back, usually even if they're moving slowly. I had a brother about my age (which I think is about as close as you can get to regular "street fighting" and still have teeth), and I'm experienced at trying to get out of something or back on balance. So I know aikido can be taught in a way that does not encourage uke handing tori the throw from a "posted" position. There are dojos that do that? Forgive my naivete; there is much I don't know, and I haven't trained other places...