I think there was a thread about this a year or so ago. It is more common than you would think. I am left-handed, but can do most things with either hand. (space here for those with overactive minds to snicker!), however, I have to think to get left and right...er..right!
I would think that the sure way to get the calling right, would be to learn it as you would a song.
My eldest son, who is right handed, has the same problem. It's just not automatic!!
Cheers, Bron.