I like your family. The more eccentric, the better.Nothing to be ashamed of. An interesting case... my father is left handed... but he does quite a few things right handed including bowling. He once told me that he knew he COULD bowl left handed but for some reason his brain just didn't know what to do and couldn't picture it. It's the same thing with sign- he fingerspells with his right hand rather than his left... but writes with his left... go figure.
My family is full of people with slightly atypical brains lol.