I really must be misunderstanding this discussion but it sounds as if the OP has fastened his crotch strap first, is trying to step into the strap, and then insert his arms in the harness. This would be somewhat akin to trying to jump into a pair of pants, both legs at one time, while holding them by the belt. I will go back and re-read, maybe after a cocktail it will make more sense.
you are right... that is absolutely what I did I thought you are not supposed to unfasten the crotch strap at all because the crotch strap loop is attached between the plate and the waist strap buckle. It didn't come to my mind that you simply use a medium sized crotch strap loop to slide it over the buckle every time ... now I know better. Thanks!