It is possible that by concentrating on the body parts mentioned you induced tension which made it more difficult to separate from them.
I would recommend, if you want to feel your energy arms, to practice tactile imaging on your energy body at separate times than a projection practice. It'll help in that regard. And relax more before you get into the trance induction (focus number repeating is good, but it's a conditioned reaction, and your body may not be ready for it although your mind is).
My great grandmother from my mother's side was Dutch, but I never knew her. Your spelling is fine, there are many multilingual folks here.