Interesting story, Gojira, thanks for sharing. I think it highlights the whole philosophy of not allowing any individual member to shine or do anything extra that might help others if they do not fit the definition of "good standing". It doesn't matter what you do, sacrifices you make, how hard yoiu work. You must conform to their standard. You would think that with something like deaf translation they would be more concerned with quality of the message being given to the "listeners" but, no. It's all about whether the person doing the signing conforms to their rules.
You remind me of a friend I had. Her parents were not strong in the "truth" but she wanted to do something extra, so she, too, learned to interpret sign language. It didn't last long because she was not "of the right attitude".
Sounds like you tried very, very hard to fit in to the congregation, but it was never really the right fit. I can sympathize.