Huertas,
nice pics!
in theory you should be able to split a seed before germinating, but I wouldn't try after the seeds have been sprouted in soil. I'd be afraid to damage the plant, but Im sure it could be done.
they can be sensitive to over watering in certain cases, especially if the water or soil quality is not optimal. For instance, overwatering with high ph or salt laden water can be detrimental...but with that said, I've had red jabo seedlings submerged underwater completely for over 1 month that showed no signs of stress. So yes, they can handle a flood...but it's best to let them breath...at least once in a while.
they also like a bit of shade, especially when less than 2yrs old.