Wheeee! Thanks for all the responses! There is a lot of great information here!
So, I've done some research... there is dominance in play for hands, feet, eyes and ears (let's not even get into hemisphere's of the brain
So DD2 is right handed, has a left eye dominance (or none, she sometimes went straight to the middle or slightly to the left) and is ambidextrous in her feet. She takes stairs leading with her left, will step on something (a coin) on the floor with her left but kicks a ball with her right. The right foot kicking could have been a learned thing though because we recall her kicking with her left when she was 2. That in combination with her left eye dominance could explain the left handedness in gymnastics, fencing and most likely tennis (even though they switched her to right handed tennis, she did better at backhands the forehands). Not sure about the ear dominance, we didn't test that.
We're all right handed here and we are sure she is right handed and not just going off our example. We did check it out and I do cartwheels left handed (also unable to do them right handed), strange as I am right handed/right eyed/right footed. Interestingly enough DH and DD1 are both left eye dominant righties, like DD2. But DD1 does cartwheels righty.
Even more fascinating was the article on ocular dominance on wiki which states:
"Approximately two-thirds of the population is right-eye dominant; however in a small portion of the population neither eye is dominant. Dominance does appear to change depending upon direction of gaze due to image size changes on the retinas. There also appears to be a higher prevalence of left-eye dominance in those with Williams-Beuren syndrome, and possibly in migraine sufferers as well. Eye dominance has been categorized as "weak" or "strong"; highly profound cases are sometimes caused by amblyopia or strabismus. In those with anisometropic myopia (i.e. different amounts of nearsightedness between the two eyes), the dominant eye has been found to be the one with more myopia."
I'll be doing some research on that for DD1 actually, who interestingly enough is left eye dominant, has been suffering from severe migraines since she was 5 and was born with congenital neurologic strabismus. Her migraines always start above her right eye (and yes, we've ruled out ocular triggers).
I just love all the different directions one question can take you when you research!